The survey did not include teens, but a previous CDC study found that about 16 percent of high school students were smokers in 2011, the AP reported.
Factors that may have contributed to this latest decline in adult smoking include more public smoking bans, higher state and federal tobacco taxes, and increased spending on prevention and cessation programs, according to Patrick Reynolds, executive director of the Foundation for a SmokeFree America.
"This is a real decline in smoking in America. I'm ecstatic about it. It's proof that we are winning the battle against tobacco," he told the AP.
Smoking is the leading cause of preventable illness and death in the U.S.
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