the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 62.30 | 0.20 % |
| 2020 | 62.18 | 0.76 % |
| 2019 | 61.71 | 0.76 % |
| 2018 | 61.24 | 2.22 % |
| 2017 | 59.91 | 1.57 % |
| 2016 | 58.99 | 1.26 % |
| 2015 | 58.25 | 1.32 % |
| 2014 | 57.49 | 0.14 % |
| 2013 | 57.41 | 0.55 % |
| 2012 | 57.10 | -0.34 % |
| 2011 | 57.29 | 0.04 % |
| 2010 | 57.27 |