Year	Number
2006-01-01	1586641
2007-01-01	1507347
2008-01-01	1582951
2009-01-01	1648074
2010-01-01	1778672
2011-01-01	1925372
2012-01-01	2211031
2013-01-01	2579730
2014-01-01	3016314
2015-01-01	3344578
2016-01-01	3740376
2017-01-01	4116270