>> residents of New York consumed the least caffeine. <<
Hmm. Crack, instead?
One of my favorite Letterman lines (and I’m sure it’s not original to him): “Live from New York, the city that never sleeps... and looks like it!”
I also suspected that crack might be the stimulant of choice in Philly, NYC, Detroit, & Balto. For San Franciso, the gay capital of America, it might be methamphetamine.