| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 93.51% | 100 |
| 2009 | 99.55% | 99.6 |
| 2010 | 93.03% | 99.2 |
| 2011 | 90.17% | 98.7 |
| 2012 | 87.6% | 98.3 |
| 2013 | 95.61% | 97.9 |
| 2014 | 76.63% | 97.5 |
| 2015 | 94.19% | 97.1 |
| 2016 | 98.24% | 96.6 |
| 2017 | 92.3% | 96.2 |
| 2018 | 100% | 95.8 |
| 2019 | 99.69% | 95.4 |
| 2020 | 69.37% | 95 |
| 2021 | 97.96% | 94.5 |
| 2022 | 83.1% | 94.1 |
