Year	Number
2007-01-01	3812847
2008-01-01	5188010
2009-01-01	7228024
2010-01-01	9591845
2011-01-01	11592935
2012-01-01	28386011
2013-01-01	29970633
2014-01-01	32781609
2015-01-01	34262918
2016-01-01	52260743
2017-01-01	55811414