the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 36.98 | 0.56 % |
| 2020 | 36.78 | 0.96 % |
| 2019 | 36.42 | -0.69 % |
| 2018 | 36.68 | 0.83 % |
| 2017 | 36.38 | -0.40 % |
| 2016 | 36.52 | -0.33 % |
| 2015 | 36.64 | -2.04 % |
| 2014 | 37.41 | -1.08 % |
| 2013 | 37.82 | -1.09 % |
| 2012 | 38.23 | -0.88 % |
| 2011 | 38.57 | -1.05 % |
| 2010 | 38.98 |