| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 97.5% | 100 |
| 2009 | 92.43% | 100.4 |
| 2010 | 97.16% | 100.9 |
| 2011 | 92.42% | 101.3 |
| 2012 | 93.15% | 101.8 |
| 2013 | 93.66% | 102.2 |
| 2014 | 91.46% | 102.7 |
| 2015 | 91.44% | 103.1 |
| 2016 | 99.05% | 103.6 |
| 2017 | 100% | 104 |
| 2018 | 98.12% | 104.5 |
| 2019 | 99.82% | 104.9 |
| 2020 | 98.89% | 105.4 |
| 2021 | 99.51% | 105.8 |
| 2022 | 97.68% | 106.3 |
