Year	Number
2004	1127894
2005	1238070
2006	1359610
2007	1434371
2008	1514719
2009	1646709
2010	1962243
2011	2380761
2012	2734919
2013	3047660
2014	3453887
2015	4125883
2016	5243936
2017	7488924