the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 51.09 | -0.44 % |
| 2020 | 51.32 | 0.56 % |
| 2019 | 51.03 | 0.17 % |
| 2018 | 50.94 | 2.05 % |
| 2017 | 49.92 | 0.42 % |
| 2016 | 49.71 | 0.78 % |
| 2015 | 49.33 | 1.02 % |
| 2014 | 48.83 | 0.53 % |
| 2013 | 48.57 | 0.95 % |
| 2012 | 48.11 | 3.17 % |
| 2011 | 46.64 | 1.65 % |
| 2010 | 45.88 |