step_ahead,prediction
1,23.292185
2,23.433384
3,23.459375
4,23.056377
5,23.005606
6,23.3756
7,22.922031
8,22.865072
9,22.917164
10,22.994188
11,22.694633
12,22.897097
13,22.734968
14,22.721283
15,22.716864