Year	Number
2004-01-01	503097
2005-01-01	853034
2006-01-01	881755
2007-01-01	1104534
2008-01-01	1129148
2009-01-01	1282156
2010-01-01	1446709
2011-01-01	1756053
2012-01-01	2098357
2013-01-01	2504878
2014-01-01	3031970
2015-01-01	3335980
2016-01-01	3674828