Table 5.  Transportation Sector Energy Price and Expenditure Estimates by Source, Selected Years, 1970-2006, United States
Year	Primary Energy																	Retail Electricity	Total Energy d
	Coal	Natural Gas a	Petroleum													Total d
			Aviation Gasoline	Distillate Fuel Oil		Jet Fuel	LPG b		Lubricants		Motor Gasoline c		Residual Fuel Oil	Total
	Prices in Nominal Dollars per Million Btu
1970	0.41	—	2.17	1.31		0.73	1.11		5.08		2.85		0.38	2.31		2.31		4.65	2.31
1971	0.46	—	2.21	1.38		0.77	1.19		5.27		2.90		0.52	2.37		2.37		5.35	2.37
1972	0.48	—	2.19	1.38		0.77	1.21		5.58		2.88		0.58	2.38		2.38		6.01	2.38
1973	0.50	—	2.36	1.66		0.91	1.34		5.33		3.10		0.66	2.57		2.57		6.70	2.57
1974	0.96	—	3.23	2.64		1.57	2.47		7.22		4.32		1.58	3.70		3.70		10.91	3.70
1975	1.26	—	3.45	2.80		2.05	2.51		7.48		4.64		1.72	4.02		4.02		11.72	4.02
1976	1.21	—	3.59	2.97		2.25	2.72		7.05		4.84		1.71	4.20		4.20		11.97	4.21
1977	1.27	—	3.97	3.31		2.59	3.20		6.97		5.13		1.87	4.47		4.47		10.85	4.48
1978	—	—	4.29	3.43		2.87	3.21		7.60		5.24		1.82	4.59		4.59		12.46	4.59
1979	—	—	5.73	5.04		3.90	4.05		10.21		7.11		2.47	6.19		6.19		13.65	6.19
1980	—	—	9.02	7.19		6.36	5.20		14.36		9.84		3.31	8.60		8.60		14.71	8.61
1981	—	—	10.84	8.55		7.57	5.92		18.00		10.94		4.44	9.83		9.83		16.90	9.84
1982	—	—	10.92	8.14		7.23	6.37		17.25		10.39		4.54	9.42		9.42		20.42	9.43
1983	—	—	10.44	7.56		6.53	6.85		16.98		9.12		4.42	8.44		8.44		21.06	8.45
1984	—	—	10.27	7.62		6.25	6.87		17.63		8.89		4.60	8.25		8.25		20.29	8.26
1985	—	—	9.99	7.52		5.91	10.24		17.61		9.01		4.36	8.26		8.26		19.74	8.27
1986	—	—	8.41	6.36		3.92	9.64		15.59		6.79		2.11	6.21		6.21		19.63	6.22
1987	—	—	7.55	6.76		4.03	9.35		13.58		7.23		2.64	6.57		6.57		23.03	6.59
1988	—	—	7.41	6.59		3.80	9.57		14.62		7.33		2.22	6.56		6.56		22.05	6.57
1989	—	—	8.28	7.16		4.39	9.16		14.48		8.02		2.47	7.17		7.17		22.99	7.18
1990	—	3.29	9.32	8.46		5.68	10.48		14.60		9.12		2.98	8.27		8.27		20.26	8.28
1991	—	3.84	8.71	8.11		4.83	11.97		16.80		8.93		2.83	7.98		7.98		20.38	7.99
1992	—	4.53	8.54	8.01		4.52	11.55		18.32		8.96		1.98	7.91		7.92		21.77	7.93
1993	—	4.30	8.24	8.05		4.29	11.88		18.96		8.83		1.98	7.87		7.87		22.43	7.88
1994	—	4.11	7.96	8.02		3.95	12.30		19.11		8.96		2.06	7.91		7.91		22.61	7.92
1995	—	3.91	8.36	7.98		4.00	12.49		19.41		9.22		2.18	8.08		8.08		22.63	8.09
1996	—	3.97	9.29	8.82		4.82	12.62		20.08		9.85		2.33	8.76		8.76		22.59	8.77
1997	—	4.34	9.39	8.57		4.53	12.16		17.98		9.81		2.95	8.69		8.69		22.47	8.70
1998	—	4.00	8.11	7.49		3.35	11.08		19.07		8.45		2.18	7.47		7.47		21.72	7.48
1999	—	4.19	8.81	8.13		4.01	13.05		16.75		9.31		2.61	8.23		8.22		20.57	8.23
2000	—	5.21	10.87	10.68		6.64	16.04		17.99		12.01		4.54	10.78		10.78		20.71	10.79
2001	—	7.09	11.01	9.98		5.72	17.06		19.00		11.35		4.38	10.21		10.20		21.59	10.21
2002	—	5.32	10.72	9.41		5.33	15.37	[R ]	21.74		10.67		4.01	9.63		9.62		21.02	9.63
2003	—	6.58	12.42	10.77		6.46	17.24	[R ]	26.51		12.34		5.06	11.20		11.20		22.03	11.21
2004	—	7.84	15.13	13.01		8.93	19.21	[R ]	29.35		14.57		5.26	13.36		13.36		21.04	13.37
2005	—	9.17	18.56	17.27	[R ]	12.86	21.75	[R ]	38.40	[R ]	17.83		6.22	16.85	[R ]	16.84	[R ]	25.08	16.85	[R ]
2006	—	9.65	22.31	19.23		14.80	23.67		46.09		20.27		7.72	19.11		19.10		27.91	19.11
	Expenditures in Million Nominal Dollars
1970	3	—	218	2,058		1,441	49		745		30,525		291	35,327		35,330		49	35,379
1971	2	—	200	2,352		1,582	60		776		32,435		362	37,766		37,768		56	37,824
1972	2	—	187	2,683		1,601	63		880		34,365		375	40,154		40,156		62	40,218
1973	1	—	197	3,695		1,938	65		870		38,598		483	45,846		45,847		71	45,918
1974	2	—	265	5,804		3,139	109		1,130		52,820		1,102	64,368		64,370		106	64,476
1975	1	—	245	5,938		4,150	105		1,158		57,992		1,226	70,813		70,814		119	70,933
1976	—	—	242	6,785		4,506	124		1,212		63,480		1,411	77,759		77,759		120	77,880
1977	—	—	279	8,237		5,417	153		1,198		69,059		1,703	86,047		86,047		113	86,160
1978	—	—	307	9,184		6,130	166		1,402		73,013		1,802	92,003		92,003		125	92,128
1979	—	—	403	14,656		8,533	84		1,970		94,013		3,028	122,688		122,688		138	122,826
1980	—	—	580	20,090		13,856	88		2,468		121,809		4,626	163,517		163,517		163	163,680
1981	—	—	610	24,798		15,575	191		2,968		135,394		5,411	184,946		185,020	[R ]	184	185,204	[R ]
1982	—	—	513	22,709		14,955	205		2,593		127,949		4,630	173,553		173,747	[R ]	225	173,972	[R ]
1983	—	—	498	21,968		13,979	261		2,673		113,830		3,632	156,841		157,156	[R ]	267	157,423	[R ]
1984	—	—	450	22,448		15,097	275		2,960		112,035		3,714	156,979		157,353	[R ]	290	157,643	[R ]
1985	—	—	503	23,830		14,747	284		2,754		115,205		3,422	160,745		161,205	[R ]	279	161,484	[R ]
1986	—	—	496	20,473		10,505	250		2,384		89,407		1,838	125,353		125,751	[R ]	296	126,047	[R ]
1987	—	—	344	22,528		11,448	193		2,348		97,574		2,373	136,807		137,295	[R ]	358	137,654	[R ]
1988	—	—	363	23,909		11,318	212		2,437		101,101		2,042	141,382		141,879	[R ]	351	142,231	[R ]
1989	—	—	394	26,387		13,434	200		2,477		110,300		2,399	155,591		156,147	[R ]	374	156,521	[R ]
1990	—	1	419	30,982		17,784	227		2,569		123,845		3,025	178,852		179,415	[R ]	328	179,743	[R ]
1991	—	1	363	29,205		14,609	238		2,644		120,624		2,905	170,589		171,225	[R ]	331	171,556	[R ]
1992	—	10	351	29,509		13,559	212		2,940		122,790		2,121	171,482		172,209	[R ]	349	172,558	[R ]
1993	—	13	316	30,571		13,002	226		3,099		124,707		1,783	173,704		173,717		365	174,082
1994	—	14	304	32,352		12,474	396		3,265		128,112		1,821	178,724		178,738		385	179,123
1995	—	18	331	33,457		12,525	209		3,260		134,641		1,988	186,411		186,429		384	186,813
1996	—	25	347	39,410		15,770	186		3,272		146,106		1,987	207,078		207,103		379	207,483
1997	—	37	373	40,050		15,000	163		3,095		147,164		2,096	207,940		207,977		376	208,353
1998	—	39	288	36,043		11,239	184		3,436		130,709		1,469	183,368		183,407		368	183,775
1999	—	50	345	40,656		13,878	176		3,049		147,592		1,737	207,433		207,483		360	207,843
2000	—	68	394	55,171		23,777	179		3,227		191,620		4,029	278,398		278,466		380	278,846
2001	—	106	385	52,799		19,602	221		3,122		182,122		2,562	260,813		260,919		404	261,323
2002	—	82	361	50,765		17,802	207		3,530		175,729		2,712	251,107		251,188	[R ]	397	251,585
2003	—	126	375	61,050		21,096	270	[R ]	3,981		204,878		2,887	294,537	[R ]	294,662	[R ]	520	295,182	[R ]
2004	—	164	473	77,193	[R ]	30,219	346	[R ]	4,464		247,181	[R ]	3,886	363,762	[R ]	363,926	[R ]	521	364,448	[R ]
2005	—	215	656	104,902	[R ]	44,679	579	[R ]	5,810	[R ]	303,931	[R ]	5,208	465,766	[R ]	465,981	[R ]	646	466,626	[R ]
2006	—	245	746	123,370		50,007	611		6,794		348,534		6,996	537,058		537,303		705	538,008
aTransportation use of natural gas is gas consumed in the operation of pipelines, primarily in compressors, and, since 1990, is also natural gas consumed as vehicle fuel. Where shown, R = Revised data. bLiquefied petroleum gases. — = No consumption, including cases where adjustments were made.  See explanation of adjustments in Section 7 of the Technical Notes. cFor expenditures, includes fuel ethanol blended into motor gasoline, beginning in 1993. Note:  Expenditure totals may not equal sum of components due to independent rounding. dFor 1981 through 1992 expenditures, total includes fuel ethanol blended into gasoline that is not shown in the motor gasoline column. Sources:  Data sources, estimation procedures, and assumptions are described in the Technical Notes.