Year	Number
2006-01-01	1560834
2007-01-01	1829867
2008-01-01	2033729
2009-01-01	2288578
2010-01-01	2660362
2011-01-01	2709701
2012-01-01	3089377
2013-01-01	3293673
2014-01-01	3666189
2015-01-01	3911681
2016-01-01	4077628