| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 99.02% | 100 |
| 2009 | 100% | 99.5 |
| 2010 | 95.66% | 98.9 |
| 2011 | 96.65% | 98.4 |
| 2012 | 94.55% | 97.8 |
| 2013 | 97.15% | 97.3 |
| 2014 | 94.83% | 96.8 |
| 2015 | 95.16% | 96.2 |
| 2016 | 92.92% | 95.7 |
| 2017 | 95.47% | 95.1 |
| 2018 | 95.42% | 94.6 |
| 2019 | 94.55% | 94.1 |
| 2020 | 89.45% | 93.5 |
| 2021 | 95.85% | 93 |
| 2022 | 87.27% | 92.4 |
