Year	Number
2006-01-01	1584929
2007-01-01	1858826
2008-01-01	2069620
2009-01-01	2332541
2010-01-01	2715993
2011-01-01	2772213
2012-01-01	3162497
2013-01-01	3373829
2014-01-01	3764494
2015-01-01	4028359
2016-01-01	4591311