The dietary energy supply is the food available for human consumption, usually expressed in kilocalories per person per day. It gives an overestimate of the total amount of food consumed as it reflects both food consumed and food wasted. It varies markedly between different regions and countries of the world. It has also changed significantly over the 21st century. Dietary energy supply is correlated with the rate of obesity

Obesity

Obesity is a medical condition in which excess body fat has accumulated to the extent that it may have an adverse effect on health, leading to reduced life expectancy and/or increased health problems...

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Regions

Region	1964-1966	1974-1976	1984-1986	1997-1999
World World World is a common name for the whole of human civilization, specifically human experience, history, or the human condition in general, worldwide, i.e. anywhere on Earth....	2358 kcal/day	2435 kcal/day	2655 kcal/day	2803 kcal/day
Sub Saharan Africa	2058 kcal/day	2079 kcal/day	2057 kcal/day	2195 kcal/day

Countries

Country	1979-1981	1989-1991	2001-2003
Canada Canada Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...	2930 kcal/day	3030 kcal/day	3590 kcal/day
China China Chinese civilization may refer to:* China for more general discussion of the country.* Chinese culture* Greater China, the transnational community of ethnic Chinese.* History of China* Sinosphere, the area historically affected by Chinese culture...	2330 kcal/day	2680 kcal/day	2940 kcal/day
Swaziland Swaziland Swaziland, officially the Kingdom of Swaziland , and sometimes called Ngwane or Swatini, is a landlocked country in Southern Africa, bordered to the north, south and west by South Africa, and to the east by Mozambique...	2400 kcal/day	2450 kcal/day	2360 kcal/day
United Kingdom United Kingdom The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...	3170 kcal/day	3250 kcal/day	3440 kcal/day
United States United States The United States of America is a federal constitutional republic comprising fifty states and a federal district...	3180 kcal/day	3460 kcal/day	3770 kcal/day