| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 100% | 100 |
| 2009 | 94.78% | 98.9 |
| 2010 | 95.4% | 97.9 |
| 2011 | 91.68% | 96.8 |
| 2012 | 92.99% | 95.7 |
| 2013 | 91.01% | 94.6 |
| 2014 | 91.8% | 93.6 |
| 2015 | 92.12% | 92.5 |
| 2016 | 95.14% | 91.4 |
| 2017 | 93.44% | 90.3 |
| 2018 | 88.73% | 89.3 |
| 2019 | 82.06% | 88.2 |
| 2020 | 82.66% | 87.1 |
| 2021 | 83.18% | 86.1 |
