Year	Number of Buildings
1999-01-01	1007.25
2000-01-01	867.50
2001-01-01	810.25
2002-01-01	776.50
2003-01-01	873.50
2004-01-01	910
2005-01-01	1019.25
2006-01-01	1137.25
2007-01-01	1113.00
2008-01-01	1022.25
2009-01-01	865.25
2010-01-01	700.25
2011-01-01	646.25
2012-01-01	585.25
2013-01-01	630.25
2014-01-01	577.75
2015-01-01	601.00
2016-01-01	635.25
2017-01-01	662.25