I work for the state (PA) and our primary is today. Currently 14% of registered voters have voted. That does not include non-registered voters...
No wonder politicians never do anything, no one cares. I don't have a number but people under 30 years old probably don't even make a percentage...
If you live in Pennsylvania, are not registered but would like to be let me know and I'll send you the forms. I only have Democrat registration, if you'd like to register Republican I can send you contact info for your reps...