|Type of fuel||1992||2000 (preliminary data)|
|Liquefied petroleum gas1||221,000||268,000|
|Compressed natural gas||23,191||100,530|
|Liquefied natural gas||90||1,900|
1 Numbers rounded to nearest thousand. These estimates are not equal to the sum of federal fleet data (for which exact counts are available) and nonfederal fleet estimates.
2 The remaining portion of 85% methanol and both ethanol fuels is gasoline.
SOURCE: U.S. Department of Energy, Energy Information Administration, Alternatives to Traditional Transportation Fuels 1999, available at http://www.eia.doe.gov, as of October 2000.