According to the CDC report Trends in Intake of Energy and Macronutrients --- United States, 1971--2000, total reported daily calorie intake increased for both men and women. For men, the increase was on the order of about 170 calories and for women over 300 calories. Despite a decrease in the percentage of calories from fat during part of the period, there was an increase in total calories consumed; absolute fat intake in grams increased. (Link thanks to Ruth Kava).