| Year | PToutP | Base 100 |
|---|---|---|
| 2006 | 100% | 100 |
| 2007 | 99.53% | 99.1 |
| 2008 | 97.84% | 98.3 |
| 2009 | 96.93% | 97.4 |
| 2010 | 90.45% | 96.6 |
| 2011 | 89.41% | 95.7 |
| 2012 | 87.74% | 94.8 |
| 2013 | 87.64% | 94 |
| 2014 | 86.93% | 93.1 |
| 2015 | 83.3% | 92.3 |
| 2016 | 85.1% | 91.4 |
| 2017 | 86.87% | 90.5 |
| 2018 | 90.34% | 89.7 |
| 2019 | 89.08% | 88.8 |
| 2020 | 89.26% | 88 |
| 2021 | 85.68% | 87.1 |
