Year	Number
2004-01-01	2203300
2005-01-01	2755400
2006-01-01	3174900
2007-01-01	4464800
2008-01-01	4712600
2009-01-01	4561300
2010-01-01	4553900
2011-01-01	4696500
2012-01-01	4556600
2013-01-01	4554900
2014-01-01	3699900
2015-01-01	3441780
2016-01-01	3269100