the highest = the best
| Data | Valor | Modificar, % |
|---|---|---|
| 2021 | 32,19 | -0,59% |
| 2020 | 32,39 | 1,39% |
| 2019 | 31,94 | 1,83% |
| 2018 | 31,37 | 2,26% |
| 2017 | 30,68 | -0,62% |
| 2016 | 30,87 | 1,63% |
| 2015 | 30,37 | -0,89% |
| 2014 | 30,65 | -5,40% |
| 2013 | 32,39 | 1,12% |
| 2012 | 32,03 | -1,98% |
| 2011 | 32,68 | -0,41% |
| 2010 | 32,81 |