Year	Number
2004-01-01	2988831
2005-01-01	3440534
2006-01-01	4229110
2007-01-01	4699500
2008-01-01	5050950
2009-01-01	5375060
2010-01-01	5580872
2011-01-01	6303032
2012-01-01	6877053
2013-01-01	7384038
2014-01-01	7766513
2015-01-01	8421157
2016-01-01	8754288
2017-01-01	8974012