Jasper County, Texas Maths?

 I did some maths( as the British would call it) this morning. 

There are  about  25,700 adults, 18+ in Jasper County, Texas. 

4485 voted in last Tuesday's run-off election. That is 17% of the adults in the county.

Now, not all residents are eligible to vote, non-US Citizens( 1.6% of the county) felons, etc. 

I did the maths, and that means about 19% of the county voted. 

81% of the adults in Jasper County, who could have voted, did not. 

Orange County was no better. Jefferson County was about the same.. ( I had to do actual math on Jefferson, the county is not just one Rep..) 

Just something to think about this weekend....