When calculating statistical properties of indices, this fails if the index only has a recent year or two years of data

[tcarruth]

E.g. for a user-specified depletion prior such as

Data@Ind[1,1] = 1
Data@Ind[nyears,1] = 0.5 # 50% depletion
Data@I_sd[1,1] = 0.01
Data@I_sd[nyears,1 = 0.1 # 10% depletion CV

The model will bomb out at index stat property calculation doing something like runMSE(OM, hist=T)

A default might be to use the specified CV - ie the 0.1 here and assume zero AC.