Smoking rates in the California have dropped dramatically over 1965 . In 1965 , 56 % of smokers consumed 20 cigarettes 2007 . By the past several decades , it had fallen to 56 % . 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 2007 , it had fallen to 41 % . The decline in heavy smoking appears to be linked to a decline in lung cancer .