Year	Number
2004-01-01	1949286
2005-01-01	2216449
2006-01-01	2297174
2007-01-01	3431407
2008-01-01	3373204
2009-01-01	3226565
2010-01-01	3373132
2011-01-01	3485916
2012-01-01	3552463
2013-01-01	3629559
2014-01-01	3831574
2015-01-01	4118981
2016-01-01	4522697
2017-01-01	4844159