Year	Number
2004-01-01	2258399
2005-01-01	2107059
2006-01-01	2148102
2007-01-01	2231388
2008-01-01	2634079
2009-01-01	2692014
2010-01-01	3128131
2011-01-01	3513009
2012-01-01	3928577
2013-01-01	4349049