step_ahead,prediction
1,12.815889885928481
2,12.818126731924712
3,12.920080897584556
4,12.973149757459758
5,12.93199853170663
6,12.888901330530643
7,12.964381145313382
8,12.800409270450473
9,12.686097867786884
10,12.858239029534161
11,12.868713300861417
12,12.764344982709735
13,12.898966038506478
14,12.957196568883955
15,12.693307355046272
16,12.881772437132895
17,12.789913751650602
18,12.927759294584392
19,12.691273459047078
20,12.87263822192326
21,12.824613072443753
22,12.777408515010029
23,12.747664251364768
24,12.677304344810544
25,12.863668125122786
26,12.803630094230174
27,13.018991545960306
28,12.713209642842411
29,12.648944097571075
30,12.736394298821686