the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 56.75 | -0.62 % |
| 2020 | 57.10 | 0.51 % |
| 2019 | 56.81 | 1.18 % |
| 2018 | 56.15 | -0.46 % |
| 2017 | 56.41 | 0.01 % |
| 2016 | 56.40 | -0.87 % |
| 2015 | 56.89 | 1.34 % |
| 2014 | 56.14 | 1.28 % |
| 2013 | 55.43 | 2.29 % |
| 2012 | 54.19 | 0.08 % |
| 2011 | 54.15 | 1.44 % |
| 2010 | 53.38 |