step_ahead,prediction
1,20.988287
2,19.372267
3,20.381285
4,20.32236
5,19.913506
6,20.200384
7,21.265638
8,20.357235
9,19.579948
10,20.170021
11,20.053095
12,20.785051
13,21.37979
14,20.797533
15,22.09407
16,20.1539
17,19.421282
18,21.318007
19,21.60789
20,21.024944
21,20.424244
22,22.89838
23,21.16112
24,22.145313
25,20.544924
26,21.009323
27,21.500057
28,23.047247
29,21.524738
30,20.884104