Type of Housing Unit and Census Region
	1978	1979	1980	1981	1982	1984	1987	1990	1993	1997	2001	2005
U.S. Total	10,563	9,745	9,321	9,514	8,625	9,038	9,128	9,218	10,006	10,245	9,865	10,543
Mobile Home	453	350	391	336	269	374	391	407	457	502	517	489
Single-Family Detached	7,476	6,916	6,612	6,924	6,037	6,270	6,315	6,613	7,214	7,520	6,845	7,806
Single-Family Attached	435	449	391	322	433	454	526	524	703	939	1,063	678
Apartments in Buildings with 2 to 4 Units	1,448	1,211	1,093	1,008	997	972	939	945	798	515	741	659
Apartments in Buildings with 5 or More Units	751	818	834	923	888	969	957	729	835	769	698	911
Total Northeast	2,887	2,497	2,433	2,468	2,184	2,292	2,370	2,298	2,383	2,379	2,158	2,516
Mobile Home	41	17	49	43	35	62	62	44	47	43	58	33
Single-Family Detached	1,540	1,369	1,302	1,369	1,169	1,306	1,367	1,398	1,457	1,526	1,239	1,610
Single-Family Attached	235	162	218	170	254	228	241	235	257	375	321	253
Apartments in Buildings with 2 to 4 Units	681	534	468	477	394	377	372	405	359	183	315	302
Apartments in Buildings with 5 or More Units	391	415	396	409	331	318	328	217	263	252	225	318
Total Midwest	3,702	3,479	2,923	3,115	2,597	2,797	2,728	2,807	3,129	3,224	2,859	2,901
Mobile Home	127	89	66	87	61	107	111	155	149	123	123	73
Single-Family Detached	2,960	2,751	2,311	2,495	1,944	1,963	1,988	2,106	2,364	2,497	2,036	2,323
Single-Family Attached	105	122	29	39	61	108	116	77	123	231	354	160
Apartments in Buildings with 2 to 4 Units	444	424	361	308	307	345	300	303	262	209	230	155
Apartments in Buildings with 5 or More Units	66	94	156	186	224	273	213	165	231	163	116	190
Total South	2,433	2,299	2,588	2,463	2,464	2,496	2,606	2,602	2,946	3,009	3,212	3,253
Mobile Home	223	166	188	137	104	124	141	116	180	207	215	250
Single-Family Detached	1,918	1,803	2,023	1,954	1,953	1,978	1,997	2,059	2,276	2,335	2,433	2,477
Single-Family Attached	47	104	71	52	43	93	95	109	221	188	249	143
Apartments in Buildings with 2 to 4 Units	145	106	143	128	179	111	142	134	84	81	126	110
Apartments in Buildings with 5 or More Units	101	119	162	192	186	191	231	184	184	198	190	274
Total West	1,540	1,469	1,377	1,468	1,380	1,453	1,425	1,510	1,548	1,633	1,635	1,872
Mobile Home	62	78	88	69	69	80	77	91	81	129	121	133
Single-Family Detached	1,058	993	975	1,106	972	1,023	963	1,050	1,117	1,162	1,137	1,396
Single-Family Attached	49	62	73	61	74	25	73	102	101	145	139	123
Apartments in Buildings with 2 to 4 Units	179	147	121	96	117	138	125	103	92	42	71	92
Apartments in Buildings with 5 or More Units	193	190	120	136	148	187	186	163	157	156	168	129
1.The Btu value of energy at the point it enters the home, building, or establishment, sometimes referred to as "delivered" energy. Sources: Energy Information Administration, Residential Energy Consumption Surveys, 1978, 1979, 1980, 1981, 1982, 1984, 1987, 1990, 1993, 1997, 2001, and 2005.