Year	Number
2004	1082333
2005	1188870
2006	1308692
2007	1351930
2008	1419590
2009	1550020
2010	1855765
2011	2289792
2012	2650584
2013	2959167
2014	3366343
2015	4042336
2016	5152514
2017	7393843