the highest = the best
| Дата | Значение | Изменение , % |
|---|---|---|
| 2021 | 28,70 | 0,65% |
| 2020 | 28,51 | 0,15% |
| 2019 | 28,47 | -1,55% |
| 2018 | 28,92 | 1,61% |
| 2017 | 28,46 | -5,19% |
| 2016 | 30,02 | -0,41% |
| 2015 | 30,14 | -3,52% |
| 2014 | 31,24 | -3,01% |
| 2013 | 32,21 | -3,68% |
| 2012 | 33,44 | -1,50% |
| 2011 | 33,95 | 0,48% |
| 2010 | 33,79 |