Year	Number
2004-01-01	3386752
2005-01-01	4787215
2006-01-01	5731522
2007-01-01	6156745
2008-01-01	6852514
2009-01-01	7169628
2010-01-01	7345728
2011-01-01	7618170
2012-01-01	7996388
2013-01-01	8296660
2014-01-01	8445736
2015-01-01	8518715
2016-01-01	8543905