Year	Subscribers
2001	50000
2002	82409
2003	140362
2004	235000
2005	1348000
2006	2300000
2007	3130000
2008	5280000
2009	7745710
2010	10990000
2011	13351187
2012	14982178
2013	14927670
2014	15750000
2015	16942750
2016	18653312
2017	17856024