Year	Number
2004	1101060
2005	1206534
2006	1327971
2007	1403179
2008	1480604
2009	1611497
2010	1929603
2011	2312761
2012	2667503
2013	2977187
2014	3395837
2015	4059360
2016	5173311
2017	7399087