| Forecast year and month | Actual value/GWh | Forecast value/GWh | Relative error rate |
| July 2017 | 13.24 | 14.36 | 8.46% |
| August 2017 | 39.75 | 40.67 | 2.31% |
| September 2017 | 33.45 | 32.86 | 1.76% |
| October 2017 | 14.86 | 14.09 | 5.18% |
| November 2017 | 12.34 | 13.73 | 11.26% |
| December 2017 | 13.99 | 15.07 | 7.72% |