Year	Number
2004-01-01	4067523
2005-01-01	5590347
2006-01-01	6921859
2007-01-01	7426770
2008-01-01	7688676
2009-01-01	7993790
2010-01-01	8469543
2011-01-01	8508723
2012-01-01	8527025
2013-01-01	8748279
2014-01-01	8858789
2015-01-01	9054862
2016-01-01	9166933