Year,Households (thousands)
1970,"18,656"
1971,"19,034"
1972,"19,203"
1973,"19,359"
1974,"19,473"
1975,"19,688"
1976,"19,804"
1977,"19,934"
1978,"20,067"
1979,"20,210"
1980,"20,363"
1981,"20,674"
1982,"20,830"
1983,"21,034"
1984,"21,285"
1985,"21,538"
1986,"21,783"
1987,"22,021"
1988,"22,251"
1989,"22,474"
1990,"22,691"
1991,"22,952"
1992,"23,135"
1993,"23,324"
1994,"23,500"
1995,"23,670"
1996,"23,836"
1997,"24,002"
1998,"24,174"
1999,"24,335"
2000,"24,549"
2001,"24,755"
2002,"24,984"
2003,"25,246"
2004,"25,508"
2005,"25,771"
2006,"26,033"
2007,"26,222"
2008,"26,411"
2009,"26,600"
2010,"26,788"
2011,"26,997"
2012,"27,155"
2013,"27,332"
2014,"27,510"
2015,"27,687"
2016,"27,864"
2017,"28,015"
2018,"28,166"
2019,"28,317"
2020,"28,467"