Year	Number
2004-01-01	4067439
2005-01-01	5589979
2006-01-01	6921460
2007-01-01	7426248
2008-01-01	7687878
2009-01-01	7992940
2010-01-01	8468267
2011-01-01	8507631
2012-01-01	8525771
2013-01-01	8745809
2014-01-01	8856317
2015-01-01	9052526
2016-01-01	9159434