time

Predictive value a

The relative error

The relative error

Jan 18

17.048

18.01

0.044

Feb 18

13.082

13.79

0.041

Mar 18

17.23

17.91

0.038

Apr 18

15.88

15.17

0.047

May 18

18.15

18.79

0.034

Jun 18

17.87

17.51

0.020

Jul 18

18.49

18.75

0.015

Aug 18

19.26

19.95

0.015

Sep 18

19.86

19.50

0.019

Oct 18

19.99

18.33

0.091

Nov 18

18.15

18.27

0.0064

Dec 18

16.69

16.42

0.15

Mean relative error

0.034