step_ahead,prediction
1,19.743102033436298
2,21.281158746033906
3,20.60669510513544
4,20.908222579210996
5,20.887332063913345
6,18.84502964913845
7,18.397490110993385
8,20.04613536298275
9,20.076297771930694
10,19.990513202548026
11,19.25255625396967
12,20.444465455412864
13,19.48671908006072
14,22.03429917693138
15,21.571912363916635
16,22.354842898249625
17,18.562292632460593
18,21.282594528794288
19,20.98002516552806
20,22.389283281564712
21,22.48749832510948
22,21.42072624415159
23,20.85490609407425
24,20.587443158775567
25,22.39533360004425
26,21.180914779007434
27,23.655189265310764
28,21.017644655704498
29,23.283912193775176
30,22.78477932214737