If you would like to analyse all the recent voting history and registration records for all New York State registered voters go to http://www.elections.ny.gov/FoilRequestVoterRegData.html and fill out the form and submit. Within days you will receive a DVD containing a zip file which in turn contains two files.
After looking at it, it appears that there are a fair number of errors.
For example, according to the data, it appears, an 183 year voted in an 2013 election. And that is only the start of the issues.