| Year | PToutP | Base 100 |
|---|---|---|
| 2008 | 85.84% | 100 |
| 2009 | 96.67% | 100.5 |
| 2010 | 97.29% | 100.9 |
| 2011 | 97.66% | 101.4 |
| 2012 | 99.23% | 101.9 |
| 2013 | 98.5% | 102.3 |
| 2014 | 95.64% | 102.8 |
| 2015 | 98.05% | 103.3 |
| 2016 | 98.6% | 103.7 |
| 2017 | 97.72% | 104.2 |
| 2018 | 97.29% | 104.7 |
| 2019 | 97.78% | 105.1 |
| 2020 | 98.44% | 105.6 |
| 2021 | 100% | 106.1 |
