| Year | PToutP | Base 100 |
|---|---|---|
| 2009 | 79.57% | 100 |
| 2010 | 79.27% | 102 |
| 2011 | 71.12% | 103.9 |
| 2012 | 67.99% | 105.9 |
| 2013 | 66.02% | 107.9 |
| 2014 | 65.29% | 109.8 |
| 2015 | 64.93% | 111.8 |
| 2016 | 70.66% | 113.8 |
| 2017 | 65.82% | 115.7 |
| 2018 | 67.64% | 117.7 |
| 2019 | 63.5% | 119.7 |
| 2020 | 62.84% | 121.7 |
| 2021 | 95.64% | 123.6 |
| 2022 | 100% | 125.6 |
| 2023 | 99.16% | 127.6 |
