Note 1: Oil Supply

"Oil Supply" is defined as the production of crude oil (including lease condensate), natural gas plant liquids, and other liquids, and refinery processing gain (loss). Beginning in 1993, U.S. data includes fuel ethanol blended into finished motor gasoline and oxygenate production from merchant MTBE plants. For definitions of these terms see the Glossary.

Note 2: Petroleum (Oil) Stocks

The International Energy Agency (IEA) assembles and reports total petroleum stock data for the member countries of the Organization for Economic Cooperation and Development (OECD). Petroleum stocks include crude oil (including strategic reserves), natural gas plant liquids, refinery feedstocks, additives and oxygenates, other hydrocarbons, and refined petroleum products. The IEA defines the United States to be the 50 States and the District of Columbia, and the U.S. Territories (Guam, Puerto Rico, and the U.S. Virgin Islands). The Energy Information Administration (EIA) does not include the United States Territories in its statistical definition of the United States. Tables 1.5, 1.6, 2.3, and 4.5 include petroleum stocks for the United States according to EIA definitions. Using IEA definitions, at the end of  November 2008, United States (including U.S. Territories) petroleum stocks totaled 1,757 million barrels.

Petroleum stock data are collected by the IEA from member governments in OECD countries. Data for stocks in countries outside the OECD are generally not available.