| Month | Type of distribution | Mean | Std. |
| JAN | Gamma | 8.926 | 0.118 |
| FEB | Weibull | 45.254 | 9.037 |
| MAR | Weibull | 55.389 | 7.538 |
| APR | Weibull | 59.218 | 9.183 |
| MAY | Normal | 75.705 | 10.463 |
| JUN | Weibull | 55.389 | 7.538 |
| JUL | Normal | 88.026 | 7.302 |
| AUG | Normal | 83.792 | 8.759 |
| SEP | Normal | 78.363 | 7.232 |
| OCT | Lognormal | 55.389 | 7.538 |
| NOV | Lognormal | 3.948 | 0.164 |
| DEC | Gamma | 3.826 | 0.102 |