According to the story: 22% legal, 10% illegal.
Assuming the accuracy of the immigration numbers, which as the article mentions: "Immigrant advocates in New Jersey said the numbers appeared to be an accurate reflection of the foreign-born population and the second generation."
How can anyone really know the true numbers? I don't believe the census to be accurate as illegals, naturally, would want to avoid such an encounter. How do I know? Illegals tell me.