Table 2.7  Type of Heating in Occupied Housing Units, 1950-2009


Year


Coal 1

Distillate
Fuel Oil


Kerosene
Liquefied
Petroleum
Gases

Natural
Gas


Electricity


Wood


Solar


Other 2


None 3


Total
  Number of Occupied Housing Units
1950
14,483,420 9,460,560   [4] 975,435 11,121,860 276,240 4,171,690 NA 769,390 1,567,686 42,826,281
1960
6,455,565 17,158,401   [4] 2,685,770 22,851,216 933,023 2,236,866 NA 223,015 480,019 53,023,875
1970
1,821,000 16,473,000   [4] 3,807,000 35,014,000 4,876,000 794,000 NA 266,000 395,000 63,446,000
1973
800,000 17,235,000   [4] 4,422,000 38,461,000 7,213,000 604,000 NA 151,000 452,000 69,338,000
1974
741,000 16,835,000   [4] 4,143,000 39,471,000 8,407,000 658,000 NA 90,000 484,000 70,829,000
1975
573,000 16,299,000   [4] 4,146,000 40,933,000 9,173,000 852,000 NA 78,000 468,000 72,522,000
1976
484,000 16,451,000   [4] 4,239,000 41,219,000 10,151,000 912,000 NA 86,000 463,000 74,005,000
1977
454,000 15,618,000 442,000   4,182,000 41,543,000 11,146,000 1,239,000 NA 150,000 507,000 75,281,000
1978
402,000 15,648,000 423,000   4,130,000 42,521,000 12,258,000 1,066,000 NA 121,000 597,000 77,166,000
1979
358,000 15,295,000 413,000   4,134,000 43,322,000 13,244,000 1,135,000 NA 100,000 570,000 78,571,000
1980
329,000 14,500,000 369,000   4,170,000 44,398,000 14,207,000 1,377,000 NA 110,000 613,000 80,073,000
1981
361,000 14,126,000 368,000   4,165,000 46,084,000 15,486,000 1,894,000 NA 102,000 589,000 83,175,000
1983 5
432,000 12,585,000 446,000   3,869,000 46,700,000 15,684,000 4,087,000 NA 158,000 677,000 84,638,000
1985
447,000 12,441,000 1,064,000   3,584,000 45,328,000 18,361,000 6,252,000 53,000 365,000 530,000 88,425,000
1987
407,000 12,738,000 1,075,000   3,659,000 45,959,000 20,608,000 5,453,000 45,000 284,000 660,000 90,888,000
1989
335,000 12,469,000 1,073,000   3,664,000 47,395,000 23,060,000 4,586,000 40,000 398,000 663,000 93,683,000
1991
319,000 11,473,000 989,000   3,882,000 47,018,000 23,714,000 4,443,000 33,000 414,000 861,000 93,146,000
1993
297,000 11,168,000 1,021,000   3,922,000 47,669,000 25,107,000 4,104,000 30,000 496,000 911,000 94,725,000
1995
210,000 10,975,000 1,055,000   4,251,000 49,203,000 26,769,000 3,533,000 16,000 637,000 1,044,000 97,693,000
1997
183,000 10,101,000 754,000   5,398,000 51,052,000 29,202,000 1,791,000 30,000 356,000 620,000 99,487,000
1999
168,000 10,026,000 724,000   5,905,000 52,366,000 31,142,000 1,703,000 19,000 205,000 544,000 102,802,000
2001 6
128,000 9,807,000 650,000   6,037,000 54,133,000 32,405,000 1,670,000 21,000 191,000 393,000 105,435,000
2003
126,000 9,501,000 635,000   6,134,000 54,928,000 32,341,000 1,560,000 17,000 158,000 441,000 105,841,000
2005
95,000 9,382,000 547,000   6,228,000 56,317,000 34,263,000 1,411,000 15,000 214,000 399,000 108,871,000
2007
91,000 8,743,000 574,000   6,095,000 56,681,000 36,079,000 1,471,000 16,000 464,000 478,000 110,692,000
2009
98,257 8,213,886 598,919   5,817,417 56,806,814 37,851,038 1,780,386 11,173 243,273 384,632 111,805,795
  Percent
1950
33.8 22.1   [4] 2.3 26.0 0.6 9.7 NA 1.8 3.7 100.0
1960
12.2 32.4   [4] 5.1 43.1 1.8 4.2 NA .4 .9 100.0
1970
2.9 26.0   [4] 6.0 55.2 7.7 1.3 NA .4 .6 100.0
1973
1.2 24.9   [4] 6.4 55.5 10.4 .9 NA .2 .7 100.0
1974
1.0 23.8   [4] 5.8 55.7 11.9 .9 NA .1 .7 100.0
1975
.8 22.5   [4] 5.7 56.4 12.6 1.2 NA .1 .6 100.0
1976
.7 22.2   [4] 5.7 55.7 13.7 1.2 NA .1 .6 100.0
1977
.6 20.7 .6   5.6 55.2 14.8 1.6 NA .2 .7 100.0
1978
.5 20.3 .5   5.4 55.1 15.9 1.4 NA .2 .8 100.0
1979
.5 19.5 .5   5.3 55.1 16.9 1.4 NA .1 .7 100.0
1980
.4 18.1 .5   5.2 55.4 17.7 1.7 NA .1 .8 100.0
1981
.4 17.0 .4   5.0 55.4 18.6 2.3 NA .1 .7 100.0
1983 5
.5 14.9 .5   4.6 55.2 18.5 4.8 NA .2 .8 100.0
1985
.5 14.1 1.2   4.1 51.3 20.8 7.1 .1 .4 .6 100.0
1987
.4 14.0 1.2   4.0 50.6 22.7 6.0 .1 .3 .7 100.0
1989
.4 13.3 1.1   3.9 50.6 24.6 4.9 (s) .4 .7 100.0
1991
.3 12.3 1.1   4.2 50.5 25.5 4.8 (s) .4 .9 100.0
1993
.3 11.8 1.1   4.1 50.3 26.5 4.3 (s) .5 1.0 100.0
1995
.2 11.2 1.1   4.4 50.4 27.4 3.6 (s) .7 1.1 100.0
1997
.2 10.2 .8   5.4 51.3 29.4 1.8 (s) .4 .6 100.0
1999
.2 9.8 .7   5.7 50.9 30.3 1.7 (s) .2 .5 100.0
2001 6
.1 9.3 .6   5.7 51.3 30.7 1.6 (s) .2 .4 100.0
2003
.1 9.0 .6   5.8 51.9 30.6 1.5 (s) .1 .4 100.0
2005
.1 8.6 .5   5.7 51.7 31.5 1.3 (s) .2 .4 100.0
2007
.1 7.9 .5   5.5 51.2 32.6 1.3 (s) .4 .4 100.0
2009
.1 7.3 .5   5.2 50.8 33.9 1.6 (s) .2 .3 100.0
1Includes coal coke. 6Beginning in 2001, data are consistent with the 2000 Census.  For 2001 data consistent with the 1990
Census, see American Housing Survey for the United States: 2001.
2Includes briquettes (made of pitch and sawdust), coal dust, waste material (such as corncobs),
purchased steam, and other fuels not separately displayed.
NA=Not available.  (s)=Less than 0.05 percent.  
3In 1950 and 1960, also includes nonreporting units, which totaled 997 and 2,000 units, respectively. Notes:    Includes mobile homes and individual housing units in apartment buildings.  Housing units with
more than one type of heating system are classified according to the principal type of heating system.
  Totals may not equal sum of components due to independent rounding.
4Included in "Distillate Fuel Oil." Web Page:  For related information, see http://www.census.gov/hhes/www/housing/ahs/ahs.html.
5Beginning in 1983, the American Housing Survey for the United States has been a biennial survey. Sources:    1950, 1960, and 1970óBureau of the Census, Census of Population and Housing.
  1973-1981óBureau of the Census, American Housing Survey for the United States, annual surveys,
Table 2-5.    1983 forwardóBureau of the Census, American Housing Survey for the United States,
biennial surveys, Table 2-5.