Year	Number
2004-01-01	6732587
2005-01-01	7121886
2006-01-01	7628079
2007-01-01	8173917
2008-01-01	8540861
2009-01-01	8849158
2010-01-01	9118180
2011-01-01	9465338
2012-01-01	9686981
2013-01-01	9617702
2014-01-01	9375934
2015-01-01	9240205
2016-01-01	9444315