| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 100% | 100 |
| 2009 | 97.95% | 99 |
| 2010 | 97.88% | 97.9 |
| 2011 | 92.85% | 96.9 |
| 2012 | 91.41% | 95.9 |
| 2013 | 91.74% | 94.8 |
| 2014 | 88.97% | 93.8 |
| 2015 | 90.51% | 92.8 |
| 2016 | 90.84% | 91.8 |
| 2017 | 92.41% | 90.7 |
| 2018 | 88.28% | 89.7 |
| 2019 | 88.03% | 88.7 |
| 2020 | 86.24% | 87.6 |
| 2021 | 83.54% | 86.6 |
