Year	Number
2004-01-01	41734802
2005-01-01	43927876
2006-01-01	53053612
2007-01-01	58087517
2008-01-01	60243938
2009-01-01	46865941
2010-01-01	49763126
2011-01-01	49204588
2012-01-01	47181320
2013-01-01	47775873
2014-01-01	50006269
2015-01-01	51405361
2016-01-01	54294875