Important Notes About The Data

Note: The emphasis of the Annual Energy Review (AER) is on long-term trends. Analysts may wish to use the data in this report in conjunction with EIA’s monthly releases that offer updates to the most recent years’ data. In particular, see the Monthly Energy Review at http://www.eia.gov/mer for statistics that include updates to many of the annual series in this report.

Data Years Displayed: For tables beginning in 1949, some early years (usually 1951-1954, 1956-1959, 1961-1964, and 1966-1969) are not shown on the tables in the printed report or the PDF formats; however, all years of data are shown in the Excel formats and the HTML formats.

Comprehensive Changes: Most AER 2009 tables and figures carry a new year of data (usually 2009), which are often preliminary and likely to be revised next year, and revisions to much of the 2008 data, which are now final in many cases.