Do you ever wonder how many of your total calories come from added sugars? Grains? Dairy products? Added fats?
Deriving your personal numbers would require detailed nutrient analysis, but if you’d like U.S. averages, see this cool infographic at Civil Eats.
It also shows how many calories are or were available for consumption per capita over time (without accounting for wastage in restaurants). It’s based on U.S. Department of Agriculture data.
A superficial glance suggests that U.S. per capita daily calorie consumption has increased by about 600 from the 1970s until now. But remember, these numbers don’t discount for restaurant wastage. Nor do I see an adjustment for children versus adults. I’ve seen other calculations of and extra daily 150 calories (women) to 300 calories (men). Even the lower numbers could explain our explosion of overweight and obesity.