Actual Data, as of 1 July
| Fecha | Valor | Cambiar , % |
|---|---|---|
| 2020 | 31,52 | 1,48 % |
| 2019 | 31,06 | 1,53 % |
| 2018 | 30,60 | 1,56 % |
| 2017 | 30,13 | 1,57 % |
| 2016 | 29,66 | 1,55 % |
| 2015 | 29,21 | 1,53 % |
| 2014 | 28,77 | 1,51 % |
| 2013 | 28,34 | 1,50 % |
| 2012 | 27,92 | 1,53 % |
| 2011 | 27,50 | 1,57 % |
| 2010 | 27,08 | 1,64 % |
| 2009 | 26,64 |