Year	Subscribers
2001	239
2002	418
2003	597
2004	2429
2005	10395
2006	21792
2007	52806
2008	115227
2009	187665
2010	270756
2011	356324
2012	418519
2013	469367
2014	509195
2015	534393
2016	557403
2017	584330