Quarter	Number of Buildings, Seasonally Adjusted
1958-01-01	1559638888.88889
1958-04-01	1541694444.44444
1958-07-01	1644138888.88889
1958-10-01	1822944444.44444
1959-01-01	2010111111.11111
1959-04-01	2073861111.11111
1959-07-01	2031583333.33333
1959-10-01	1967222222.22222
1960-01-01	2074111111.11111
1960-04-01	2045277777.77778
1960-07-01	1814333333.33333
1960-10-01	1777416666.66667
1961-01-01	1850583333.33333
1961-04-01	1952888888.88889
1961-07-01	1913333333.33333
1961-10-01	1960722222.22222
1962-01-01	1954888888.88889
1962-04-01	2172305555.55556
1962-07-01	2070333333.33333
1962-10-01	2153416666.66667
1963-01-01	2176055555.55556
1963-04-01	2322583333.33333
1963-07-01	2325388888.88889
1963-10-01	2427583333.33333
1964-01-01	2626388888.88889
1964-04-01	2537694444.44444
1964-07-01	2496305555.55556
1964-10-01	2535333333.33333
1965-01-01	2534388888.88889
1965-04-01	2478000000.00000
1965-07-01	2527000000.00000
1965-10-01	2548944444.44444
1966-01-01	2623138888.88889
1966-04-01	2424722222.22222
1966-07-01	2427000000.00000
1966-10-01	2167250000.00000
1967-01-01	2093388888.88889
1967-04-01	2319166666.66667
1967-07-01	2415916666.66667
1967-10-01	2684305555.55556
1968-01-01	2704444444.44444
1968-04-01	2808027777.77778
1968-07-01	2871444444.44444
1968-10-01	2970166666.66667
1969-01-01	3138027777.77778
1969-04-01	3185722222.22222
1969-07-01	3157583333.33333
1969-10-01	2923250000.00000
1970-01-01	2942111111.11111
1970-04-01	2887611111.11111
1970-07-01	2898722222.22222
1970-10-01	3241805555.55556
1971-01-01	3486222222.22222
1971-04-01	3948833333.33333
1971-07-01	4195861111.11111
1971-10-01	4412666666.66667
1972-01-01	4785027777.77778
1972-04-01	4983527777.77778
1972-07-01	5041472222.22222
1972-10-01	5352888888.88889
1973-01-01	5616055555.55556
1973-04-01	5489777777.77778
1973-07-01	5446777777.77778
1973-10-01	5209666666.66667
1974-01-01	4923250000.00000
1974-04-01	4721361111.11111
1974-07-01	4733805555.55556
1974-10-01	4303777777.77778
1975-01-01	3977361111.11111
1975-04-01	4102388888.88889
1975-07-01	4358111111.11111
1975-10-01	4650333333.33333
1976-01-01	5148805555.55556
1976-04-01	5576555555.55555
1976-07-01	5481833333.33333
1976-10-01	6467222222.22222
1977-01-01	6697833333.33333
1977-04-01	7620888888.88889
1977-07-01	8018555555.55555
1977-10-01	8066722222.22222
1978-01-01	8318861111.11111
1978-04-01	9031944444.44444
1978-07-01	9440277777.77778
1978-10-01	9617861111.11111
1979-01-01	9543666666.66667
1979-04-01	9634333333.33333
1979-07-01	9864444444.44444
1979-10-01	9767777777.77778
1980-01-01	9342250000.00000
1980-04-01	7750305555.55556
1980-07-01	7765888888.88889
1980-10-01	8825055555.55556
1981-01-01	9115888888.88889
1981-04-01	8788250000.00000
1981-07-01	8090222222.22222
1981-10-01	7311722222.22222
1982-01-01	7005305555.55555
1982-04-01	6896055555.55556
1982-07-01	6932138888.88889
1982-10-01	7425916666.66667
1983-01-01	8764805555.55556
1983-04-01	9929194444.44444
1983-07-01	11041694444.44440
1983-10-01	11771777777.77780
1984-01-01	12432527777.77780
1984-04-01	12810083333.33330
1984-07-01	13048861111.11110
1984-10-01	13242833333.33330
1985-01-01	13141500000.00000
1985-04-01	13172305555.55560
1985-07-01	13284361111.11110
1985-10-01	13893833333.33330
1986-01-01	14781194444.44440
1986-04-01	15650805555.55560
1986-07-01	16304750000.00000
1986-10-01	16526750000.00000
1987-01-01	16462638888.88890
1987-04-01	16591138888.88890
1987-07-01	16586444444.44440
1987-10-01	16885166666.66670
1988-01-01	16755666666.66670
1988-04-01	16892444444.44440
1988-07-01	17055388888.88890
1988-10-01	17380416666.66670
1989-01-01	17455222222.22220
1989-04-01	17128944444.44440
1989-07-01	16895555555.55560
1989-10-01	16718361111.11110
1990-01-01	17227888888.88890
1990-04-01	16680250000.00000
1990-07-01	15632638888.88890
1990-10-01	14412777777.77780
1991-01-01	13244305555.55560
1991-04-01	13244750000.00000
1991-07-01	14119333333.33330
1991-10-01	14645972222.22220
1992-01-01	15399611111.11110
1992-04-01	16535361111.11110
1992-07-01	16813638888.88890
1992-10-01	17425638888.88890
1993-01-01	17964083333.33330
1993-04-01	18045777777.77780
1993-07-01	18847888888.88890
1993-10-01	20060750000.00000
1994-01-01	20980583333.33330
1994-04-01	21766166666.66670
1994-07-01	21727111111.11110
1994-10-01	21595222222.22220
1995-01-01	21265833333.33330
1995-04-01	20402361111.11110
1995-07-01	20287055555.55560
1995-10-01	20701750000.00000
1996-01-01	21616694444.44440
1996-04-01	23425388888.88890
1996-07-01	24097527777.77780
1996-10-01	24017444444.44440
1997-01-01	23738472222.22220
1997-04-01	23823000000.00000
1997-07-01	23980805555.55560
1997-10-01	24808777777.77780
1998-01-01	25700416666.66670
1998-04-01	26101305555.55560
1998-07-01	26400777777.77780
1998-10-01	26635416666.66670
1999-01-01	27551694444.44440
1999-04-01	28372638888.88890
1999-07-01	29577166666.66670
1999-10-01	31047500000.00000
2000-01-01	32299222222.22220
2000-04-01	31720916666.66670
2000-07-01	30382111111.11110
2000-10-01	30763777777.77780
2001-01-01	31769611111.11110
2001-04-01	32109388888.88890
2001-07-01	32821222222.22220
2001-10-01	32878388888.88890
2002-01-01	33685333333.33330
2002-04-01	35407861111.11110
2002-07-01	36006138888.88890
2002-10-01	37379472222.22220
2003-01-01	37810361111.11110
2003-04-01	38713722222.22220
2003-07-01	40885472222.22220
2003-10-01	43088027777.77780
2004-01-01	44684805555.55560
2004-04-01	46939694444.44440
2004-07-01	48869666666.66670
2004-10-01	49744944444.44440
2005-01-01	52042777777.77780
2005-04-01	53638666666.66670
2005-07-01	54902861111.11110
2005-10-01	55933277777.77780
2006-01-01	55980361111.11110
2006-04-01	55228805555.55560
2006-07-01	51977055555.55560
2006-10-01	49793333333.33330
2007-01-01	47382194444.44440
2007-04-01	45502833333.33330
2007-07-01	42913833333.33330
2007-10-01	39162888888.88890
2008-01-01	33599833333.33330
2008-04-01	31475972222.22220
2008-07-01	29490805555.55560
2008-10-01	27184638888.88890
2009-01-01	22544500000.00000
2009-04-01	20964638888.88890
2009-07-01	20838722222.22220
2009-10-01	22653861111.11110
2010-01-01	21949527777.77780
2010-04-01	22017972222.22220
2010-07-01	19919916666.66670
2010-10-01	20312361111.11110
2011-01-01	20152916666.66670
2011-04-01	21014305555.55560
2011-07-01	19803388888.88890
2011-10-01	20954305555.55560
2012-01-01	21467972222.22220
2012-04-01	22425166666.66670
2012-07-01	24079805555.55560
2012-10-01	25442138888.88890
2013-01-01	26887472222.22220
2013-04-01	27998138888.88890
2013-07-01	27950694444.44440
2013-10-01	29236250000.00000