step_ahead,prediction
1,156.27428271792274
2,154.77086909899205
3,157.4184643942678
4,152.58892730166318
5,160.08692728019733
6,155.78610421856666
7,158.09320420522505
8,155.85669413188256
9,154.15767447408547
10,154.63128354365833
11,153.34513279746463
12,154.00255661224398
13,153.10695497948086
14,158.17560119706513
15,153.9607425066148
16,158.50717805733203
17,152.16999700215433
18,151.64701287693478
19,151.29546816328136
20,157.2428893482453
21,152.685167619527
22,153.75353459246057
23,153.1467959770679
24,153.1626597657268
25,152.26822621292462
26,151.81299072544027
27,150.33016056960525
28,148.74094042813763
29,153.36090187693748
30,150.55009108441524