The percentage of U.S. adults who smoke cigarettes continues to decline and more adults have successfully quit smoking than remain current smokers. The study estimates that 20.9 percent – 44.5 million people – are current smokers, down from 21.6 percent in 2003 and 22.5 percent in 2002, according to a recent article in CDC’s Morbidity and Mortality Weekly Report (MMWR).

"We are encouraged by the continued decline in cigarette smoking among U.S. adults and want to congratulate those who have successfully quit," said CDC Director Dr. Julie Gerberding.

"Quitting smoking is the most important step smokers can take to improve their overall health and reduce their risk of disease," Dr. Gerberding said. "For smokers who want to quit, resources are available to help, including calling the national network of quitlines at 1-800-QUIT-NOW or going to www.smokefree.gov."

The report also indicates that the prevalence of heavy smoking (25 or more cigarettes per day) has declined over the past decade, from 19.1 percent of smokers in 1993 to 12.1 percent of smokers in 2004.

In another study in the MMWR, the 2004 Behavior Risk Factor Surveillance System reports that 50 percent or more of smokers had quit in 36 states/areas. In the majority of states, most adults have never been smokers and among those who have ever smoked, the majority have quit. In four states, Connecticut, California, Vermont, and Utah, 60 percent or more of smokers have quit smoking.

The CDC said it would formally implement its tobacco-free campus policy. The policy bans theuse of all tobacco products at CDC owned facilities and grounds, and in government vehicles.

"The tobacco-free initiative fits with one of CDC’s public health goals, to achieve healthy workplaces by promoting and protecting the health and safety of people who work by preventing workplace-related fatalities, illnesses, injuries, and personal health risks. This includes preventing exposure to tobacco and promoting physical education programs," said Gerberding.