Year	Number
2004-01-01	656566
2005-01-01	1118223
2006-01-01	1393907
2007-01-01	1561224
2008-01-01	1747881
2009-01-01	1872379
2010-01-01	2123389
2011-01-01	2417448
2012-01-01	3165766
2013-01-01	3104127
2014-01-01	3607159
2015-01-01	3771410
2016-01-01	4230423