Year	Number
2004-01-01	503245
2005-01-01	680092
2006-01-01	861959
2007-01-01	1094201
2008-01-01	1199171
2009-01-01	1190063
2010-01-01	1216496
2011-01-01	1313965
2012-01-01	1427785
2013-01-01	1493290
2014-01-01	1514480
2015-01-01	1474533