Find better dataset for Data Analysis activity

[Enturk]

The current lead-in-school-water activity is great, but only has a draw for local students. It would be nice to use a national, or even world-wide dataset so that the activity is more accessible to students from outside Delaware, which is a small state whose very existence is in doubt.

A good dataset would have:

• at least county-level US data
• be accessible via API
• be updated relatively regularly
• have some draw to it
• be about events that most people have some understanding of (e.g. maybe not voting)
• would be better if comparable across the planet, but that's hard to achieve (maybe a stretch goal for the future)

Transportation data is a good candidate, but much of it has very little draw. Accident/injury/death rates per mile driven might be good.