the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 48.18 | 0.12 % |
| 2020 | 48.12 | 1.18 % |
| 2019 | 47.56 | 1.76 % |
| 2018 | 46.74 | 0.96 % |
| 2017 | 46.29 | 0.72 % |
| 2016 | 45.96 | 0.32 % |
| 2015 | 45.82 | -0.52 % |
| 2014 | 46.05 | 0.43 % |
| 2013 | 45.85 | -1.30 % |
| 2012 | 46.46 | -1.71 % |
| 2011 | 47.27 | 0.40 % |
| 2010 | 47.08 |