Year	Subscribers
2000	284
2001	3235
2002	10000
2003	19533
2004	49147
2005	60770
2006	109674
2007	338559
2008	412108
2009	454714
2010	434876
2011	457422
2012	476141
2013	496000
2014	505000
2015	503503
2016	519154
2017	525679