Year	Number
2004-01-01	852463
2005-01-01	1340157
2006-01-01	1772601
2007-01-01	2016947
2008-01-01	2467862
2009-01-01	2658664
2010-01-01	2883706
2011-01-01	3294490
2012-01-01	4024819
2013-01-01	4014747
2014-01-01	4926172
2015-01-01	5000780
2016-01-01	5629480