The NBL site shows 386 NJ racers in 2006 and 268 so far in 2007. Of course, these are active riders so the numbers don’t include those that have a license but aren’t racing. Interesting to compare to NY which had 1125 races in 2006 and 336 so far in 2007.
EDIT… meant to say NY had 1125 “racers” not races.