From medpagetoday.com: The percentage of people who smoke remained essentially unchanged from 2010 to 2011, but over time the prevalence of heavy smoking declined significantly, according to the Centers for Disease Control and Prevention.
Overall, 19% of U.S. adults described themselves as smokers in 2011, down just a hair from 19.3% in 2010, but among those who self-described as daily or heavy smokers, the proportion who said they smoked 30 or more cigarettes a day decreased by more than 25% since 2005 (12.6% to 9.1%).
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