Year	Number
2006-01-01	3352620
2007-01-01	3727708
2008-01-01	4172591
2009-01-01	3779966
2010-01-01	4768995
2011-01-01	5441184
2012-01-01	5831181
2013-01-01	6043280
2014-01-01	6765729
2015-01-01	7765472