Quarter	Number of Buildings, Seasonally Adjusted
1990-01-01	35740.000000000000
1990-04-01	32240.000000000004
1990-07-01	32409.999999999996
1990-10-01	33480.000000000000
1991-01-01	30650.000000000000
1991-04-01	33390.000000000000
1991-07-01	35330.000000000000
1991-10-01	34740.000000000000
1992-01-01	34600.000000000000
1992-04-01	32330.000000000000
1992-07-01	31770.000000000000
1992-10-01	30470.000000000000
1993-01-01	38860.000000000000
1993-04-01	36350.000000000000
1993-07-01	37560.000000000000
1993-10-01	38960.000000000000
1994-01-01	41350.000000000000
1994-04-01	42030.000000000000
1994-07-01	41520.000000000000
1994-10-01	40260.000000000000
1995-01-01	35440.000000000000
1995-04-01	36700.000000000000
1995-07-01	32960.000000000000
1995-10-01	30270.000000000000
1996-01-01	32090.000000000004
1996-04-01	34410.000000000000
1996-07-01	38540.000000000000
1996-10-01	40330.000000000000
1997-01-01	40340.000000000000
1997-04-01	38660.000000000000
1997-07-01	38340.000000000000
1997-10-01	40230.000000000000
1998-01-01	38950.000000000000
1998-04-01	37150.000000000000
1998-07-01	37630.000000000000
1998-10-01	35340.000000000000
1999-01-01	36750.000000000000
1999-04-01	36610.000000000000
1999-07-01	36830.000000000000
1999-10-01	38350.000000000000
2000-01-01	36840.000000000000
2000-04-01	36420.000000000000
2000-07-01	35220.000000000000
2000-10-01	33700.000000000000
2001-01-01	35000.000000000000
2001-04-01	36960.000000000000
2001-07-01	37460.000000000000
2001-10-01	37360.000000000000
2002-01-01	38660.000000000000
2002-04-01	34870.000000000000
2002-07-01	39670.000000000000
2002-10-01	37500.000000000000
2003-01-01	39600.000000000000
2003-04-01	40030.000000000000
2003-07-01	40020.000000000000
2003-10-01	41730.000000000000
2004-01-01	41180.000000000000
2004-04-01	44890.000000000000
2004-07-01	44900.000000000000
2004-10-01	45800.000000000000
2005-01-01	40060.000000000000
2005-04-01	42630.000000000000
2005-07-01	44530.000000000000
2005-10-01	46900.000000000000
2006-01-01	47820.000000000000
2006-04-01	41870.000000000000
2006-07-01	40350.000000000000
2006-10-01	40100.000000000000
2007-01-01	48920.000000000000
2007-04-01	44410.000000000000
2007-07-01	44960.000000000000
2007-10-01	45410.000000000000
2008-01-01	36640.000000000000
2008-04-01	30270.000000000000
2008-07-01	20330.000000000000
2008-10-01	18690.000000000000
2009-01-01	17120.000000000000
2009-04-01	19190.000000000000
2009-07-01	24550.000000000000
2009-10-01	25270.000000000000
2010-01-01	27780.000000000000
2010-04-01	30690.000000000000
2010-07-01	27430.000000000000
2010-10-01	23990.000000000000
2011-01-01	27400.000000000000
2011-04-01	29130.000000000000
2011-07-01	27740.000000000000
2011-10-01	29350.000000000000
2012-01-01	25280.000000000000
2012-04-01	23000.000000000000
2012-07-01	26250.000000000000
2012-10-01	26880.000000000000
2013-01-01	28100.000000000000
2013-04-01	31030.000000000000
2013-07-01	32930.000000000000
2013-10-01	32880.000000000000
2014-01-01	36890.000000000000
2014-04-01	37240.000000000000
2014-07-01	34910.000000000000
2014-10-01	31080.000000000000
2015-01-01	39750.000000000000
2015-04-01	35100.000000000000
2015-07-01	36090.000000000000
2015-10-01	36960.000000000000
2016-01-01	35900.000000000000
2016-04-01	38150.000000000000
2016-07-01	40650.000000000000
2016-10-01	41730.000000000000
2017-01-01	42800.000000000000
2017-04-01	40370.000000000000
2017-07-01	39810.000000000000
2017-10-01	41550.000000000000
2018-01-01	40200.000000000000
2018-04-01	38730.000000000000