Year	Number
2004-01-01	3482716
2005-01-01	3777963
2006-01-01	4229882
2007-01-01	4549058
2008-01-01	4705394
2009-01-01	7031870
2010-01-01	7035762
2011-01-01	7661631
2012-01-01	8315302
2013-01-01	8898355
2014-01-01	9884192
2015-01-01	11100023
2016-01-01	11115914