Quarter	Number of Buildings, Seasonally Adjusted
1999-01-01	1007.136451530
1999-04-01	1091.719102080
1999-07-01	1015.887312700
1999-10-01	917.212894600
2000-01-01	837.363464760
2000-04-01	870.324482660
2000-07-01	881.236474320
2000-10-01	883.423161800
2001-01-01	874.802180250
2001-04-01	792.982557560
2001-07-01	812.400492470
2001-10-01	761.414175290
2002-01-01	889.058225700
2002-04-01	733.689242700
2002-07-01	725.579604220
2002-10-01	755.358262780
2003-01-01	891.817220420
2003-04-01	887.200185680
2003-07-01	840.572615810
2003-10-01	869.074028850
2004-01-01	859.849229620
2004-04-01	861.553214490
2004-07-01	925.282464540
2004-10-01	986.941803850
2005-01-01	918.593630820
2005-04-01	1034.257981500
2005-07-01	1091.213074530
2005-10-01	1028.066114020
2006-01-01	1065.879620950
2006-04-01	1166.943029300
2006-07-01	1145.008104720
2006-10-01	1169.235545700
2007-01-01	1092.508069540
2007-04-01	1093.654615300
2007-07-01	1206.875693310
2007-10-01	1059.439579270
2008-01-01	1071.232821360
2008-04-01	1070.326275520
2008-07-01	985.197220510
2008-10-01	963.440747140
2009-01-01	959.020976170
2009-04-01	875.396597760
2009-07-01	823.667121390
2009-10-01	801.729485230
2010-01-01	700.181840910
2010-04-01	677.792794630
2010-07-01	755.862282970
2010-10-01	663.588945380
2011-01-01	748.203245100
2011-04-01	693.907090530
2011-07-01	606.971545150
2011-10-01	531.622781170
2012-01-01	529.598095410
2012-04-01	517.006326050
2012-07-01	592.359732730
2012-10-01	698.488668610
2013-01-01	652.413680910
2013-04-01	628.521211030
2013-07-01	631.494598980
2013-10-01	604.572411733
2014-01-01	579.987611880
2014-04-01	598.643009940
2014-07-01	567.645114547
2014-10-01	559.230285593
2015-01-01	618.934159320
2015-04-01	567.399887700
2015-07-01	627.489195967
2015-10-01	585.165010724
2016-01-01	624.424112540
2016-04-01	647.614884230
2016-07-01	627.412887502
2016-10-01	637.487556100
2017-01-01	633.776259850
2017-04-01	649.254721040
2017-07-01	699.747167222
2017-10-01	662.849043250
2018-01-01	695.317459520
2018-04-01	562.147762180
2018-07-01	696.498764788