quickstats: age adjusted daily kilocalorie intake among adults aged 20 74 years, by sex national health and nutrition examination survey, united states, 1971 2008* /

The average daily kilocalorie intake for men increased from the survey period 1971--1974 to 1988--1994 and then leveled off through 2007--2008. For women,the average daily kilocalorie intake increased from 1971--1974 to 1999--2000 and remained relatively steady through 2007--2008. From 1971--1974 to 2007--2008, men consumed more kilocalories on a daily basis than women.

Source: cdc.gov