Quarter	Year	Members
1	2009	37.3
2	2009	42
3	2009	48
4	2009	55.1
1	2010	64.2
2	2010	71.8
3	2010	80.6
4	2010	90.4
1	2011	101.5
2	2011	115.8
3	2011	131.2
4	2011	145
1	2012	160.6
2	2012	173.9
3	2012	187.4
4	2012	201.9
1	2013	218.3
2	2013	238.1
3	2013	259.2
4	2013	276.8
1	2014	296.5
2	2014	313.4