step_ahead,prediction
1,138.27203
2,136.51715
3,137.56773
4,137.36736
5,137.16325
6,137.1508
7,136.96857
8,136.32587
9,136.84007
10,136.46959
11,135.6839
12,136.45428
13,134.4521
14,136.64415
15,136.8593
16,133.96858
17,134.21065
18,134.12212
19,133.85265
20,133.53824
21,133.75732
22,131.55618
23,133.4447
24,133.08412
25,132.52666
26,133.22348
27,132.73091
28,132.47311
29,133.63553
30,132.25475