step_ahead,prediction
1,10.517843
2,10.134311
3,10.567864
4,10.063845
5,11.521808
6,9.117423
7,11.05558
8,9.813808
9,12.362136
10,11.066218
11,9.739382
12,9.705425
13,10.405668
14,10.585986
15,9.375314