| Year | PToutP | Base 100 |
|---|---|---|
| 2009 | 100% | 100 |
| 2011 | 88.32% | 100.1 |
| 2012 | 90.57% | 100.1 |
| 2013 | 90.34% | 100.2 |
| 2014 | 90.21% | 100.2 |
| 2015 | 91.95% | 100.3 |
| 2016 | 91.31% | 100.3 |
| 2017 | 92.27% | 100.4 |
| 2018 | 91.71% | 100.4 |
| 2019 | 90.99% | 100.5 |
| 2020 | 89.41% | 100.5 |
| 2021 | 88.86% | 100.6 |
| 2022 | 86.93% | 100.6 |
