About 15% of adults smoked cigarettes in 2015, down from about 17% in 2014 and 21% in 2005, according to a new report by the Centers for Disease Control and Prevention. Cigarette smoking rates were higher among men than women, Native Americans than other racial and ethnic groups, and those with less education and income. They also were higher among adults who were uninsured, on Medicaid or psychologically distressed. According to a new CDC Vital Signs report, cigarette smoking causes three in 10 cancer deaths.