Year	Number
2004-01-01	6793893
2005-01-01	6968766
2006-01-01	7272522
2007-01-01	7690044
2008-01-01	8193451
2009-01-01	8493802
2010-01-01	8909875
2011-01-01	9296730
2012-01-01	9675568
2013-01-01	10045185
2014-01-01	10367169
2015-01-01	10568386
2016-01-01	10824187