] In the United States, 19 percent of adult women and 24
] percent of adult men smoke, according to the U.S. Centers
] for Disease Control. Smoking is the single biggest cause
] of heart disease and cancer.

Little fact at the end of an otherwise unsurprising article. I really had no gauge of how many people in the US smoke. Some of my friends do, but its below 24%. I'd be interested in figures on smoking by education level, race, and economic status. Quick google shows some limited info about California...

19% of US Females and 24% of US males smoke.