| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 90% | 100 |
| 2009 | 87.4% | 101.5 |
| 2010 | 82.42% | 103 |
| 2011 | 82.16% | 104.5 |
| 2012 | 81.9% | 105.9 |
| 2013 | 83.46% | 107.4 |
| 2014 | 95.75% | 108.9 |
| 2015 | 98.96% | 110.4 |
| 2016 | 93.68% | 111.9 |
| 2017 | 100% | 113.4 |
| 2018 | 94.58% | 114.9 |
| 2019 | 96.85% | 116.3 |
| 2020 | 97.66% | 117.8 |
| 2021 | 98.56% | 119.3 |
