Year	Number
2007-01-01	5594335
2008-01-01	7649936
2009-01-01	12209186
2010-01-01	15517467
2011-01-01	19734042
2012-01-01	98841910
2013-01-01	104910931
2014-01-01	105639325
2015-01-01	107370041
2016-01-01	152601041
2017-01-01	173025417