step_ahead,prediction
1,18.607292
2,18.162107
3,18.281506
4,18.573349
5,18.557825
6,18.458807
7,17.180166
8,18.516962
9,18.073664
10,17.88492
11,18.592735
12,17.646816
13,18.397783
14,18.45302
15,18.611877
16,17.806572
17,18.22071
18,17.6129
19,18.503235
20,18.287657
21,18.304358
22,18.208303
23,18.137995
24,18.35203
25,17.790106
26,18.019466
27,17.956852
28,18.074709
29,18.500563
30,17.79845