Year	Number
2005-01-01	577071
2006-01-01	910119
2007-01-01	1256823
2008-01-01	1751503
2009-01-01	2087031
2010-01-01	2521225
2011-01-01	2852239
2012-01-01	3348551
2013-01-01	3949786
2014-01-01	4608476