Year	Number
2004-01-01	5379461
2005-01-01	5952163
2006-01-01	6552964
2007-01-01	8015092
2008-01-01	8380838
2009-01-01	8135063
2010-01-01	8145929
2011-01-01	6668817
2012-01-01	6744193
2013-01-01	8063354
2014-01-01	8389912
2015-01-01	8958364
2016-01-01	9656330