step_ahead,prediction
1,25.447098
2,25.531649
3,27.126335
4,26.02098
5,25.575666
6,25.303606
7,25.909477
8,26.156448
9,25.80005
10,26.009502
11,25.064213
12,26.245157
13,25.959541
14,26.368423
15,26.329874