Quarter	Number of Buildings, Seasonally Adjusted
2000-01-01	12878.76798922040
2000-04-01	11692.87258100790
2000-07-01	11792.25795254130
2000-10-01	14193.07305228580
2001-01-01	12455.68000238110
2001-04-01	9824.60100309245
2001-07-01	9194.27754360454
2001-10-01	17443.58963370980
2002-01-01	6936.71498102016
2002-04-01	6943.84357681239
2002-07-01	7190.87015121565
2002-10-01	7567.25957852318
2003-01-01	6891.45293774354
2003-04-01	7477.23364085590
2003-07-01	7931.24969389775
2003-10-01	10208.15186902930
2004-01-01	10616.46340267070
2004-04-01	9820.01179833857
2004-07-01	9443.78692268376
2004-10-01	9145.28563011686
2005-01-01	11804.25807250630
2005-04-01	9672.46742764892
2005-07-01	10295.80732419340
2005-10-01	10436.53242512070
2006-01-01	13017.66320119590
2006-04-01	13417.52132199690
2006-07-01	14149.41070961620
2006-10-01	15822.43609410840
2007-01-01	18699.57749777270
2007-04-01	21048.95031124850
2007-07-01	20953.61796223020
2007-10-01	21712.02996439040
2008-01-01	20859.10909994430
2008-04-01	19409.32562555830
2008-07-01	19593.21211599680
2008-10-01	17002.17299283950
2009-01-01	17492.27574541240
2009-04-01	14397.90803299820
2009-07-01	14287.68998208350
2009-10-01	14011.58705351100
2010-01-01	14287.45719535200
2010-04-01	14191.85790568690
2010-07-01	14859.28438855120
2010-10-01	14969.02547397680
2011-01-01	14530.96481822640
2011-04-01	15616.18002627510
2011-07-01	15957.30904073720
2011-10-01	15185.12280228970
2012-01-01	14815.97523721900
2012-04-01	15028.75101375820
2012-07-01	12288.57865585690
2012-10-01	13029.36284867790
2013-01-01	11541.79445121000
2013-04-01	11546.84001215670
2013-07-01	11354.59427647170
2013-10-01	11849.32144555520
2014-01-01	12805.67601409680
2014-04-01	13198.76004593140
2014-07-01	13533.71454433720
2014-10-01	12643.82079405970
2015-01-01	14641.59154358280
2015-04-01	14612.44828832060
2015-07-01	16228.59376389310
2015-10-01	17432.67163869810
2016-01-01	15859.90818239970
2016-04-01	16798.04487725900
2016-07-01	18017.67635560780
2016-10-01	19748.74405645200
2017-01-01	22074.41570433670
2017-04-01	21409.39544670590
2017-07-01	19744.57083433620
2017-10-01	20507.14187627520
2018-01-01	25139.56780843930
2018-04-01	19431.51481687790
2018-07-01	20272.77050237810