Year	Number
2004	1086819
2005	1193577
2006	1314499
2007	1356512
2008	1426168
2009	1554194
2010	1861833
2011	2298366
2012	2657985
2013	2968795
2014	3377254
2015	4051295
2016	5164567
2017	7413144