diff --git a/ddionrails/datasets/GIP_W56_V1.json b/ddionrails/datasets/GIP_W56_V1.json
index 78d9af2..89a80a6 100644
--- a/ddionrails/datasets/GIP_W56_V1.json
+++ b/ddionrails/datasets/GIP_W56_V1.json
@@ -112,8 +112,8 @@
       ]
     },
     "statistics": {
-      "valid": 4038,
-      "invalid": 1
+      "valid": 4036,
+      "invalid": 3
     },
     "scale": "cat"
   },
@@ -205,8 +205,8 @@
       ]
     },
     "statistics": {
-      "valid": 4039,
-      "invalid": 0
+      "valid": 4032,
+      "invalid": 7
     },
     "scale": "cat"
   },
@@ -489,8 +489,8 @@
       ]
     },
     "statistics": {
-      "valid": 4038,
-      "invalid": 1
+      "valid": 4036,
+      "invalid": 3
     },
     "scale": "cat"
   },
@@ -720,8 +720,8 @@
       ]
     },
     "statistics": {
-      "valid": 4036,
-      "invalid": 3
+      "valid": 4027,
+      "invalid": 12
     },
     "scale": "cat"
   },
@@ -1116,8 +1116,8 @@
       ]
     },
     "statistics": {
-      "valid": 4014,
-      "invalid": 25
+      "valid": 3956,
+      "invalid": 83
     },
     "scale": "cat"
   },
@@ -1205,8 +1205,8 @@
       ]
     },
     "statistics": {
-      "valid": 4018,
-      "invalid": 21
+      "valid": 3959,
+      "invalid": 80
     },
     "scale": "cat"
   },
@@ -1294,8 +1294,8 @@
       ]
     },
     "statistics": {
-      "valid": 4017,
-      "invalid": 22
+      "valid": 3935,
+      "invalid": 104
     },
     "scale": "cat"
   },
@@ -1400,8 +1400,8 @@
       ]
     },
     "statistics": {
-      "valid": 4005,
-      "invalid": 34
+      "valid": 3823,
+      "invalid": 216
     },
     "scale": "cat"
   },
@@ -1489,8 +1489,8 @@
       ]
     },
     "statistics": {
-      "valid": 4004,
-      "invalid": 35
+      "valid": 3812,
+      "invalid": 227
     },
     "scale": "cat"
   },
@@ -1578,8 +1578,8 @@
       ]
     },
     "statistics": {
-      "valid": 4003,
-      "invalid": 36
+      "valid": 3707,
+      "invalid": 332
     },
     "scale": "cat"
   },
@@ -1667,8 +1667,8 @@
       ]
     },
     "statistics": {
-      "valid": 4003,
-      "invalid": 36
+      "valid": 3802,
+      "invalid": 237
     },
     "scale": "cat"
   },
@@ -1877,8 +1877,8 @@
       ]
     },
     "statistics": {
-      "valid": 675,
-      "invalid": 3364
+      "valid": 662,
+      "invalid": 3377
     },
     "scale": "cat"
   },
@@ -1966,8 +1966,8 @@
       ]
     },
     "statistics": {
-      "valid": 682,
-      "invalid": 3357
+      "valid": 661,
+      "invalid": 3378
     },
     "scale": "cat"
   },
@@ -2055,8 +2055,8 @@
       ]
     },
     "statistics": {
-      "valid": 672,
-      "invalid": 3367
+      "valid": 651,
+      "invalid": 3388
     },
     "scale": "cat"
   },
@@ -2144,8 +2144,8 @@
       ]
     },
     "statistics": {
-      "valid": 675,
-      "invalid": 3364
+      "valid": 658,
+      "invalid": 3381
     },
     "scale": "cat"
   },
@@ -2233,8 +2233,8 @@
       ]
     },
     "statistics": {
-      "valid": 665,
-      "invalid": 3374
+      "valid": 613,
+      "invalid": 3426
     },
     "scale": "cat"
   },
@@ -2322,8 +2322,8 @@
       ]
     },
     "statistics": {
-      "valid": 632,
-      "invalid": 3407
+      "valid": 583,
+      "invalid": 3456
     },
     "scale": "cat"
   },
@@ -2532,8 +2532,8 @@
       ]
     },
     "statistics": {
-      "valid": 531,
-      "invalid": 3508
+      "valid": 528,
+      "invalid": 3511
     },
     "scale": "cat"
   },
@@ -2621,8 +2621,8 @@
       ]
     },
     "statistics": {
-      "valid": 496,
-      "invalid": 3543
+      "valid": 483,
+      "invalid": 3556
     },
     "scale": "cat"
   },
@@ -2710,8 +2710,8 @@
       ]
     },
     "statistics": {
-      "valid": 470,
-      "invalid": 3569
+      "valid": 457,
+      "invalid": 3582
     },
     "scale": "cat"
   },
@@ -2799,8 +2799,8 @@
       ]
     },
     "statistics": {
-      "valid": 508,
-      "invalid": 3531
+      "valid": 477,
+      "invalid": 3562
     },
     "scale": "cat"
   },
@@ -2888,8 +2888,8 @@
       ]
     },
     "statistics": {
-      "valid": 488,
-      "invalid": 3551
+      "valid": 484,
+      "invalid": 3555
     },
     "scale": "cat"
   },
@@ -2977,8 +2977,8 @@
       ]
     },
     "statistics": {
-      "valid": 495,
-      "invalid": 3544
+      "valid": 483,
+      "invalid": 3556
     },
     "scale": "cat"
   },
@@ -3066,8 +3066,8 @@
       ]
     },
     "statistics": {
-      "valid": 513,
-      "invalid": 3526
+      "valid": 492,
+      "invalid": 3547
     },
     "scale": "cat"
   },
@@ -3155,8 +3155,8 @@
       ]
     },
     "statistics": {
-      "valid": 500,
-      "invalid": 3539
+      "valid": 490,
+      "invalid": 3549
     },
     "scale": "cat"
   },
@@ -3365,8 +3365,8 @@
       ]
     },
     "statistics": {
-      "valid": 505,
-      "invalid": 3534
+      "valid": 487,
+      "invalid": 3552
     },
     "scale": "cat"
   },
@@ -3454,8 +3454,8 @@
       ]
     },
     "statistics": {
-      "valid": 496,
-      "invalid": 3543
+      "valid": 454,
+      "invalid": 3585
     },
     "scale": "cat"
   },
@@ -3543,8 +3543,8 @@
       ]
     },
     "statistics": {
-      "valid": 487,
-      "invalid": 3552
+      "valid": 461,
+      "invalid": 3578
     },
     "scale": "cat"
   },
@@ -3632,8 +3632,8 @@
       ]
     },
     "statistics": {
-      "valid": 485,
-      "invalid": 3554
+      "valid": 463,
+      "invalid": 3576
     },
     "scale": "cat"
   },
@@ -3721,8 +3721,8 @@
       ]
     },
     "statistics": {
-      "valid": 478,
-      "invalid": 3561
+      "valid": 454,
+      "invalid": 3585
     },
     "scale": "cat"
   },
@@ -3810,8 +3810,8 @@
       ]
     },
     "statistics": {
-      "valid": 485,
-      "invalid": 3554
+      "valid": 438,
+      "invalid": 3601
     },
     "scale": "cat"
   },
@@ -3899,8 +3899,8 @@
       ]
     },
     "statistics": {
-      "valid": 530,
-      "invalid": 3509
+      "valid": 479,
+      "invalid": 3560
     },
     "scale": "cat"
   },
@@ -3988,8 +3988,8 @@
       ]
     },
     "statistics": {
-      "valid": 533,
-      "invalid": 3506
+      "valid": 511,
+      "invalid": 3528
     },
     "scale": "cat"
   },
@@ -4114,8 +4114,8 @@
       ]
     },
     "statistics": {
-      "valid": 3999,
-      "invalid": 40
+      "valid": 3928,
+      "invalid": 111
     },
     "scale": "cat"
   },
@@ -4240,8 +4240,8 @@
       ]
     },
     "statistics": {
-      "valid": 3999,
-      "invalid": 40
+      "valid": 3779,
+      "invalid": 260
     },
     "scale": "cat"
   },
@@ -4342,8 +4342,8 @@
       ]
     },
     "statistics": {
-      "valid": 1998,
-      "invalid": 2041
+      "valid": 1901,
+      "invalid": 2138
     },
     "scale": "cat"
   },
@@ -4395,8 +4395,8 @@
       ]
     },
     "statistics": {
-      "valid": 2001,
-      "invalid": 2038
+      "valid": 1885,
+      "invalid": 2154
     },
     "scale": "cat"
   },
@@ -4480,8 +4480,8 @@
       ]
     },
     "statistics": {
-      "valid": 3998,
-      "invalid": 41
+      "valid": 3996,
+      "invalid": 43
     },
     "scale": "cat"
   },
@@ -4529,8 +4529,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3991,
+      "invalid": 48
     },
     "scale": "cat"
   },
@@ -4578,8 +4578,8 @@
       ]
     },
     "statistics": {
-      "valid": 3991,
-      "invalid": 48
+      "valid": 3989,
+      "invalid": 50
     },
     "scale": "cat"
   },
@@ -4627,8 +4627,8 @@
       ]
     },
     "statistics": {
-      "valid": 3989,
-      "invalid": 50
+      "valid": 3988,
+      "invalid": 51
     },
     "scale": "cat"
   },
@@ -4733,8 +4733,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3751,
+      "invalid": 288
     },
     "scale": "cat"
   },
@@ -4790,8 +4790,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3714,
+      "invalid": 325
     },
     "scale": "cat"
   },
@@ -4855,8 +4855,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3891,
+      "invalid": 148
     },
     "scale": "cat"
   },
@@ -4920,8 +4920,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3965,
+      "invalid": 74
     },
     "scale": "cat"
   },
@@ -4985,8 +4985,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3896,
+      "invalid": 143
     },
     "scale": "cat"
   },
@@ -5046,8 +5046,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3951,
+      "invalid": 88
     },
     "scale": "cat"
   },
@@ -5107,8 +5107,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3877,
+      "invalid": 162
     },
     "scale": "cat"
   },
@@ -5172,8 +5172,8 @@
       ]
     },
     "statistics": {
-      "valid": 3996,
-      "invalid": 43
+      "valid": 3917,
+      "invalid": 122
     },
     "scale": "cat"
   },
@@ -5237,8 +5237,8 @@
       ]
     },
     "statistics": {
-      "valid": 3995,
-      "invalid": 44
+      "valid": 3901,
+      "invalid": 138
     },
     "scale": "cat"
   },
@@ -5326,8 +5326,8 @@
       ]
     },
     "statistics": {
-      "valid": 3995,
-      "invalid": 44
+      "valid": 3675,
+      "invalid": 364
     },
     "scale": "cat"
   },
@@ -6701,15 +6701,15 @@
       "frequencies": []
     },
     "statistics": {
-      "Min.": -90,
+      "Min.": 0,
       "1st Qu.": 2,
       "Median": 4,
-      "Mean": 2.05520702634881,
-      "3rd Qu.": 5,
+      "Mean": 4.40041173443129,
+      "3rd Qu.": 6,
       "Max.": 10,
-      "NA's": 54,
-      "valid": 3985,
-      "invalid": 54
+      "NA's": 153,
+      "valid": 3886,
+      "invalid": 153
     },
     "scale": ""
   },
@@ -6725,15 +6725,15 @@
       "frequencies": []
     },
     "statistics": {
-      "Min.": -90,
+      "Min.": 0,
       "1st Qu.": 2,
       "Median": 5,
-      "Mean": 2.21260040160643,
+      "Mean": 4.53808543489449,
       "3rd Qu.": 6,
       "Max.": 10,
-      "NA's": 55,
-      "valid": 3984,
-      "invalid": 55
+      "NA's": 153,
+      "valid": 3886,
+      "invalid": 153
     },
     "scale": ""
   },
@@ -6749,15 +6749,15 @@
       "frequencies": []
     },
     "statistics": {
-      "Min.": -90,
+      "Min.": 0,
       "1st Qu.": 2,
-      "Median": 4,
-      "Mean": 2.15085341365462,
+      "Median": 5,
+      "Mean": 4.4990990990991,
       "3rd Qu.": 6,
       "Max.": 10,
-      "NA's": 55,
-      "valid": 3984,
-      "invalid": 55
+      "NA's": 154,
+      "valid": 3885,
+      "invalid": 154
     },
     "scale": ""
   },
@@ -8194,8 +8194,8 @@
       ]
     },
     "statistics": {
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-      "invalid": 52
+      "valid": 3974,
+      "invalid": 65
     },
     "scale": "cat"
   },
@@ -8279,8 +8279,8 @@
       ]
     },
     "statistics": {
-      "valid": 3988,
-      "invalid": 51
+      "valid": 3977,
+      "invalid": 62
     },
     "scale": "cat"
   },
@@ -8413,8 +8413,8 @@
       ]
     },
     "statistics": {
-      "valid": 3987,
-      "invalid": 52
+      "valid": 3976,
+      "invalid": 63
     },
     "scale": "cat"
   },
@@ -8491,8 +8491,8 @@
       ]
     },
     "statistics": {
-      "valid": 3983,
-      "invalid": 56
+      "valid": 3980,
+      "invalid": 59
     },
     "scale": "cat"
   },
@@ -8552,8 +8552,8 @@
       ]
     },
     "statistics": {
-      "valid": 3983,
-      "invalid": 56
+      "valid": 3978,
+      "invalid": 61
     },
     "scale": "cat"
   },
@@ -8569,15 +8569,15 @@
       "frequencies": []
     },
     "statistics": {
-      "Min.": -90,
+      "Min.": 0,
       "1st Qu.": 0,
       "Median": 2,
-      "Mean": 2.62390158172232,
+      "Mean": 2.99747920342828,
       "3rd Qu.": 4,
       "Max.": 24,
-      "NA's": 56,
-      "valid": 3983,
-      "invalid": 56
+      "NA's": 72,
+      "valid": 3967,
+      "invalid": 72
     },
     "scale": ""
   },
@@ -8593,15 +8593,15 @@
       "frequencies": []
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     "statistics": {
-      "Min.": -90,
+      "Min.": 0,
       "1st Qu.": 0,
       "Median": 7,
-      "Mean": 5.2385136831534,
+      "Mean": 5.59853830645161,
       "3rd Qu.": 9,
       "Max.": 24,
-      "NA's": 56,
-      "valid": 3983,
-      "invalid": 56
+      "NA's": 71,
+      "valid": 3968,
+      "invalid": 71
     },
     "scale": ""
   },
@@ -8925,8 +8925,8 @@
       ]
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     "statistics": {
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-      "invalid": 57
+      "valid": 3978,
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     },
     "scale": "cat"
   },
@@ -9954,8 +9954,8 @@
       ]
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     "statistics": {
-      "valid": 894,
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+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10003,8 +10003,8 @@
       ]
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     "statistics": {
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+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10052,8 +10052,8 @@
       ]
     },
     "statistics": {
-      "valid": 894,
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+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10101,8 +10101,8 @@
       ]
     },
     "statistics": {
-      "valid": 894,
-      "invalid": 3145
+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10150,8 +10150,8 @@
       ]
     },
     "statistics": {
-      "valid": 894,
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+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10199,8 +10199,8 @@
       ]
     },
     "statistics": {
-      "valid": 894,
-      "invalid": 3145
+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10248,8 +10248,8 @@
       ]
     },
     "statistics": {
-      "valid": 894,
-      "invalid": 3145
+      "valid": 893,
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     },
     "scale": "cat"
   },
@@ -10305,8 +10305,8 @@
       ]
     },
     "statistics": {
-      "valid": 3982,
-      "invalid": 57
+      "valid": 3978,
+      "invalid": 61
     },
     "scale": "cat"
   },
@@ -10362,8 +10362,8 @@
       ]
     },
     "statistics": {
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-      "invalid": 57
+      "valid": 3973,
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     },
     "scale": "cat"
   },
@@ -10419,8 +10419,8 @@
       ]
     },
     "statistics": {
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-      "invalid": 57
+      "valid": 3973,
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     },
     "scale": "cat"
   },
@@ -10476,8 +10476,8 @@
       ]
     },
     "statistics": {
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-      "invalid": 57
+      "valid": 3970,
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     },
     "scale": "cat"
   },
@@ -10533,8 +10533,8 @@
       ]
     },
     "statistics": {
-      "valid": 3982,
-      "invalid": 57
+      "valid": 3977,
+      "invalid": 62
     },
     "scale": "cat"
   },
@@ -10590,8 +10590,8 @@
       ]
     },
     "statistics": {
-      "valid": 3982,
-      "invalid": 57
+      "valid": 3975,
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     },
     "scale": "cat"
   },
@@ -10647,8 +10647,8 @@
       ]
     },
     "statistics": {
-      "valid": 3982,
-      "invalid": 57
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     },
     "scale": "cat"
   },
@@ -10708,8 +10708,8 @@
       ]
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     "statistics": {
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     "scale": "cat"
   },
diff --git a/ddionrails/datasets/GIP_W57_V1.json b/ddionrails/datasets/GIP_W57_V1.json
index 20a229c..f5b2e54 100644
--- a/ddionrails/datasets/GIP_W57_V1.json
+++ b/ddionrails/datasets/GIP_W57_V1.json
@@ -112,8 +112,8 @@
       ]
     },
     "statistics": {
-      "valid": 4078,
-      "invalid": 1
+      "valid": 4076,
+      "invalid": 3
     },
     "scale": "cat"
   },
@@ -205,8 +205,8 @@
       ]
     },
     "statistics": {
-      "valid": 4079,
-      "invalid": 0
+      "valid": 4072,
+      "invalid": 7
     },
     "scale": "cat"
   },
@@ -489,8 +489,8 @@
       ]
     },
     "statistics": {
-      "valid": 4078,
-      "invalid": 1
+      "valid": 4076,
+      "invalid": 3
     },
     "scale": "cat"
   },
@@ -720,8 +720,8 @@
       ]
     },
     "statistics": {
-      "valid": 4075,
-      "invalid": 4
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1275,8 +1275,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1324,8 +1324,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1373,8 +1373,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1422,8 +1422,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1471,8 +1471,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1520,8 +1520,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1569,8 +1569,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
+      "invalid": 13
     },
     "scale": "cat"
   },
@@ -1618,8 +1618,8 @@
       ]
     },
     "statistics": {
-      "valid": 4067,
-      "invalid": 12
+      "valid": 4066,
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