| Year | Original values | Forecasting values | Residuals |
| Jan 2014 | 404.75 | 403.76 | 0.99 |
| Feb 2014 | 404.12 | 402.60 | 1.52 |
| Mar 2104 | 403.38 | 402.55 | 0.83 |
| Apr 2104 | 402.58 | 403.45 | −0.87 |
| May 2104 | 400.97 | 401.43 | −0.46 |
| Jun 2104 | 398.95 | 397.63 | 1.32 |
| Jul 2104 | 395.35 | 394.90 | 0.45 |
| Aug 2104 | 393.36 | 393.97 | −0.61 |
| Sep 2104 | 395.86 | 395.76 | 0.10 |
| Oct 2014 | 401.45 | 399.85 | 1.60 |
| Nov 2014 | 404.86 | 402.25 | 2.61 |
| Dec 2104 | 404.63 | 403.31 | 1.32 |
| Jan 2015 | 404.69 | 404.16 | 0.53 |
| Feb 2105 | 405.92 | 404.30 | 1.62 |
| Mar 2015 | 405.92 | 404.60 | 1.32 |
| Apr 2015 | 405.6 | 405.44 | 0.16 |
| May 2015 | 403.84 | 403.51 | 0.33 |
| Jun 2015 | 398.26 | 399.64 | −1.38 |
| Jul 2015 | 396.02 | 396.97 | −0.95 |
| Aug 2015 | 397.86 | 395.98 | 1.88 |
| Sep 2105 | 400.33 | 397.83 | 2.50 |
| Oct 2015 | 404.64 | 401.88 | 2.76 |
| Nov 2015 | 407.33 | 404.31 | 3.02 |
| Dec 2105 | 407.54 | 405.33 | 2.21 |