Contributed by Olga Vanucci.
Primary voter turnout in New Jersey in 2017: 15%
Primary voter turnout in Hunterdon County, NJ, in 2017: 30%
Primary voter turnout in Pennsylvania in 2017: 16%
Primary voter turnout in Bucks County, PA, in 2017: 12%
Sources:
https://www.state.nj.us/state/elections/2017-results/2017-official-primary-voter-turnout.pdf
and
https://www.philly.com/philly/news/politics/2017-primary-election-roundup-Philadelphia-Pennsylvania.html
and
http://www.buckscounty.org/government/CommunityServices/BoardofElections/VoterCounts