step_ahead,prediction
1,74.66605
2,74.52047
3,74.98932
4,75.90384
5,74.04426
6,76.08951
7,75.25537
8,75.56212
9,75.53092
10,75.73736
11,76.732544
12,77.54913
13,75.75983
14,75.84401
15,76.4484
16,77.54494
17,76.343346
18,75.75101
19,72.35447
20,76.156685
21,77.20546
22,75.685234
23,75.744736
24,76.64946
25,75.44786
26,75.21721
27,78.12521
28,78.20856
29,79.119545
30,77.71663