Year	Number
2004-01-01	271183
2005-01-01	404723
2006-01-01	538532
2007-01-01	618671
2008-01-01	910152
2009-01-01	1070059
2010-01-01	1155085
2011-01-01	1553398
2012-01-01	1733388
2013-01-01	1895664
2014-01-01	1961816
2015-01-01	2533084
2016-01-01	2829748
2017-01-01	2878609