step_ahead,prediction
1,704.0570176392794
2,728.8685908854007
3,696.1711591929197
4,686.4216756761074
5,712.4225750982762
6,727.951174619794
7,713.9895015895366
8,729.4841270923615
9,696.986182358861
10,709.3995351195335
11,671.5751472681761
12,670.1513591468334
13,690.2278844982386
14,663.7116633921862
15,675.4056148350239
16,699.8234545230865
17,683.9055374771357
18,677.1690253823996
19,680.3858409166336
20,692.7722853124142
21,704.120255240798
22,694.2905765533447
23,658.2263019442559
24,675.0977878510952
25,659.4046174764634
26,655.8770309358836
27,662.1820082247258
28,662.9603488713503
29,692.1528041154146
30,643.820022648573