step_ahead,prediction
1,161.55877117045367
2,156.1881289283704
3,156.40419215141776
4,156.21074863896558
5,159.05773834054864
6,154.20182473963658
7,154.9541155890824
8,157.0082157701444
9,157.1597188980527
10,155.1824594365841
11,155.44036833498933
12,151.23144475352976
13,152.47963290099253
14,158.22556029269234
15,154.90395129021883