step_ahead,prediction
1,199.91742
2,199.56667
3,200.24232
4,200.0658
5,200.2221
6,201.57817
7,202.09949
8,201.25958
9,200.78568
10,200.38185
11,201.43794
12,201.77112
13,202.30885
14,203.11055
15,202.91087