Quarterly Number of Buildings
1999-01-01 951
1999-04-01 1188
1999-07-01 1074
1999-10-01 816
2000-01-01 786
2000-04-01 966
2000-07-01 936
2000-10-01 782
2001-01-01 830
2001-04-01 885
2001-07-01 864
2001-10-01 662
2002-01-01 847
2002-04-01 823
2002-07-01 777
2002-10-01 659
2003-01-01 845
2003-04-01 979
2003-07-01 892
2003-10-01 778
2004-01-01 801
2004-04-01 960
2004-07-01 978
2004-10-01 901
2005-01-01 846
2005-04-01 1141
2005-07-01 1142
2005-10-01 948
2006-01-01 986
2006-04-01 1276
2006-07-01 1193
2006-10-01 1094
2007-01-01 1014
2007-04-01 1200
2007-07-01 1247
2007-10-01 991
2008-01-01 1003
2008-04-01 1166
2008-07-01 1017
2008-10-01 903
2009-01-01 905
2009-04-01 956
2009-07-01 846
2009-10-01 754
2010-01-01 658
2010-04-01 741
2010-07-01 773
2010-10-01 629
2011-01-01 711
2011-04-01 745
2011-07-01 620
2011-10-01 509
2012-01-01 493
2012-04-01 560
2012-07-01 605
2012-10-01 683
2013-01-01 613
2013-04-01 670
2013-07-01 642
2013-10-01 596
2014-01-01 535
2014-04-01 642
2014-07-01 575
2014-10-01 559
2015-01-01 565
2015-04-01 615
2015-07-01 631
2015-10-01 593
2016-01-01 563
2016-04-01 698
2016-07-01 628
2016-10-01 652
2017-01-01 567
2017-04-01 701
2017-07-01 697
2017-10-01 684
2018-01-01 625
2018-04-01 614
2018-07-01 692