Fewer U.S. adults are smoking , and those who do smoke are on average smoking less , according to a new study in the Journal of the American Medical Association . Smoking rates in the U.S. have dropped dramatically over the past several decades . In 1965 , 56 % of smokers consumed 20 cigarettes daily . By 2010 that number had fallen to 24 %. The decline in heavy smoking appears to be linked to a decline in lung cancer .
Smoking rates in the U.S. have dropped dramatically over the past several decades . In 1965 , 56 % of smokers consumed 20 cigarettes daily . By 2010 that number had fallen to 24 %. The decline in heavy smoking appears to be linked to a decline in lung cancer .