Line graph shows that from 1965 to 2012 the percentage of ever smokers, 18 years of age and older, who had quit smoking approximately doubled in the three youngest age groups: 18--24 years of age (from 13 percent in 1965 to 26 in 2012), 25--44 years of age (from 21 percent in 1965 to 40 percent in 2012), 45--64 years of age (from 27 percent in 1965 to 56 percent in 2012). Among those 65 years of age and older, 45 percent quit smoking in 1965 compared with 82 percent in 2012.