Depends on your scope. Kids from Marlboro, Manalapan, Colts Neck, Freehold, Howell, Old Bridge, and East Brunswick probably collectively make up 5-7% of the total enrollment every year. My class alone in Marlboro had upwards of 100-150 kids at Rutgers.
That was Cult/UDel territory 20 years ago, the 08 recession and GS 1.0 started to change the picture