From 2003-2006 to 2007-2010 the percentage of daily calories consumed from fast foods among adults aged =20 years declined from 12.8% to 11.3%. A decrease from 12.7% to 10.5% also was observed for those aged 40-59 years,but no statistically meaningful change was famous for persons aged 20-39 years or =60 years. During both periods, the percentage of daily calories from consumption of fast foods was highest among those aged 20-39 years.
Source: cdc.gov