Estimated Number of Alternative-Fueled Vehicles in the U.S., 1992–2005

Year	Liquefied petroleum gases¹	Compressed natural gas	Liquefied natural gas	Methanol, 85%²	Methanol, neat	Ethanol, 85%²	Ethanol, 95%²	Electricity	Total
1992	221,000	23,191	90	4,850	404	172	38	1,607	251,352
1993	269,000	32,714	299	10,263	414	441	27	1,690	314,848
1994	264,000	41,227	484	15,484	415	605	33	2,224	324,472
1995	259,000	50,218	603	18,319	386	1,527	136	2,860	333,049
1996	263,000	60,144	663	20,265	172	4,536	361	3,280	352,421
1997	271,000	73,773	965	20,656	172	9,389	357	4,040	380,352
1998	266,000	78,782	1,172	19,648	200	12,788	14	5,243	383,847
1999³	268,000	89,633	1,422	19,497	200	22,359	14	6,417	407,542
2000⁴	270,000	101,991	1,682	18,725	200	30,017	14	7,590	430,219
2005	173,795	117,699	2,748	18,725	-	246,363	-	51,398	592,125