There were 288 carjackings in the city in 2010 ( a 70 % increase from the previous year ) .
Essex County ( which includes Newark ) had 69 in December 2010 alone .
There were 288 carjackings in the city in 2010 ( a 70 % increase from the previous year ) , and Essex County ( which includes Newark ) had 69 in December 2010 alone .