Real value of U.S. petroleum net imports

* Includes petroleum preparations, liquefied propane and butane, and, beginning in 1997, other mineral fuels.
** This figure is preliminary.
Real prices are those that have been adjusted to remove the effect of changes in the purchasing power of the dollar; they usually reflect buying power relative to a reference year. The values are represented in chained (2005) dollars.
Net imports equal imports minus exports.
Totals may not equal sum due to independent rounding.