Information on this page was collected from the source acknowledged below:
"In 2015, world total primary energy consumption was about 542 quadrillion British thermal units (Btu), and U.S. primary consumption was about 97 quadrillion Btu, equal to 18% of world total primary energy consumption."
- International Energy Statistics: Total Primary Energy Consumption (Data), Energy Information Administration
Online data tables with total annual primary energy consumption from 1980-2014 by world, region, and country.
- How We Use Energy (Website), National Academy of Sciences
Highlights of energy use by sector in the U.S.
- Key World Energy Statistics (Report), International Energy Agency
Summary of sources, uses, prices, emissions, and projections of energy use worldwide.