step_ahead,prediction
1,866.5969
2,867.8628
3,856.37683
4,863.1003
5,819.8972
6,828.7941
7,830.82544
8,816.67456
9,819.54553
10,816.6111
11,807.43854
12,816.00244
13,805.3711
14,811.26587
15,786.2263