Month	Year	Earning
1	2010	18.96
2	2010	18.97
3	2010	18.93
4	2010	18.99
5	2010	19.04
6	2010	18.90
7	2010	18.95
8	2010	19.04
9	2010	19.12
10	2010	19.22
11	2010	19.21
12	2010	19.22
1	2011	19.48
2	2011	19.37
3	2011	19.33
4	2011	19.40
5	2011	19.44
6	2011	19.28
7	2011	19.38
8	2011	19.35
9	2011	19.51
10	2011	19.65
11	2011	19.56
12	2011	19.56
1	2012	19.76
2	2012	19.66
3	2012	19.66
4	2012	19.80
5	2012	19.63
6	2012	19.59
7	2012	19.73
8	2012	19.60
9	2012	19.87
10	2012	19.80
11	2012	19.84
12	2012	19.95
1	2013	20.04
2	2013	20.07
3	2013	20.03
4	2013	20.08
5	2013	19.99
6	2013	20.07
7	2013	20.03
8	2013	20.02
9	2013	20.30
10	2013	20.25
11	2013	20.30
12	2013	20.39
1	2014	20.50
2	2014	20.67
3	2014	20.59
4	2014	20.55
5	2014	20.47
6	2014	20.52
7	2014	20.49