step_ahead,prediction
1,11.421851
2,11.330766
3,11.356819
4,11.371897
5,11.314749
6,11.296638
7,11.358726
8,11.374271
9,11.460268
10,11.342614
11,11.449075
12,11.413998
13,11.41685
14,11.439242
15,11.390646