step_ahead,prediction
1,184.25585655868053
2,189.99404745548964
3,200.45929177105427
4,184.6158375069499
5,195.73805874586105
6,193.23788790404797
7,183.24459435790777
8,181.3525611013174
9,195.33471586555243
10,187.8254103884101
11,186.45575745403767
12,191.18472328782082
13,182.92436877638102
14,181.71561854332685
15,181.6421672552824
16,184.27552117407322
17,186.91901920735836
18,192.9637369737029
19,181.61988346278667
20,188.0292592793703
21,179.04440088570118
22,178.3207700625062
23,189.68515085428953
24,189.84874548763037
25,178.54349365830421
26,193.96050015836954
27,175.11271464079618
28,193.68319997936487
29,188.11637809872627
30,185.6961960941553