2.3.12	2005 Household Energy Expenditures, by Vintage ($2009)
													|	Percent of Residential
Year		Per Square Foot (1)				Per Household		Per Household Member					|	Sector Expenditures
Prior to 1950			1.41			2,160				880			|		22%
1950 to 1969			1.33			1,940				765			|		22%
1970 to 1979			1.30			1,816				730			|		16%
1980 to 1989			1.17			1,850				735			|		16%
1990 to 1999			1.06			2,093				746			|		16%
2000 to 2005			1.01			2,129				771			|		9%
													|	Total	100%
Average			1.23			1,987				774			|
Note(s):	1) Energy expenditures per square foot were calculated using estimates of average heated floor space per household. According to the 2005 Residential Energy Consumption Survey (RECS), the average heated floor space per household in the U.S. was 1,618 square feet. Average total floor space, which includes garages, attics and unfinished basements, equaled 2,309 square feet.