step_ahead,prediction
1,15.683407418359907
2,16.040824220381946
3,15.968665934791158
4,15.983930985873677
5,16.145575955276296
6,16.12580376092481
7,16.278351414204945
8,16.49760931111926
9,16.984972215051535
10,16.768545069309106
11,16.6472227360587
12,16.76230576780418
13,16.57250571412901
14,17.074716972161625
15,17.06855729231054
16,17.063843194703956
17,17.468960028334095
18,17.13469128584297
19,17.38822057321734
20,17.507799285192124
21,17.348579213395098
22,17.21807002838812
23,17.28324918169818
24,17.20809811332088
25,17.536676231151276
26,17.299284425120998
27,17.358214672757768
28,17.431017676876372
29,17.822065952914834
30,17.839187396798263