| Month | PRP1 | PRT1 | PRB1 |
| [-] | [-] | [-] | |
| January | 11.95% | 17.53% | 20.51% |
| February | 13.31% | 19.61% | 21.35% |
| March | 9.94% | 16.29% | 19.04% |
| April | 11.33% | 15.68% | 18.40% |
| May | 10.37% | 14.10% | 17.80% |
| June | 9.45% | 12.84% | 15.95% |
| July | 9.67% | 13.00% | 16.92% |
| August | 10.07% | 13.73% | 16.87% |
| September | 11.67% | 15.99% | 19.65% |
| October | 11.96% | 18.94% | 20.84% |
| November | 8.65% | 14.22% | 16.70% |
| December | 8.41% | 13.54% | 17.23% |
| Average | 10.46% | 14.93% | 17.80% |