| Year | PToutP | Base 100 |
|---|---|---|
| 2006 | 99.78% | 100 |
| 2007 | 100% | 100 |
| 2008 | 94.05% | 100.1 |
| 2009 | 91.94% | 100.1 |
| 2011 | 90.18% | 100.2 |
| 2012 | 89.73% | 100.3 |
| 2013 | 91.77% | 100.3 |
| 2014 | 83.57% | 100.4 |
| 2015 | 90.35% | 100.4 |
| 2016 | 90.12% | 100.5 |
| 2017 | 90.81% | 100.5 |
| 2018 | 88.64% | 100.6 |
| 2019 | 88.49% | 100.6 |
| 2020 | 91.54% | 100.7 |
| 2021 | 89.11% | 100.7 |
