the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 61.16 | -0.18 % |
| 2020 | 61.27 | 0.21 % |
| 2019 | 61.14 | 0.48 % |
| 2018 | 60.85 | 2.01 % |
| 2017 | 59.65 | 1.00 % |
| 2016 | 59.06 | 0.46 % |
| 2015 | 58.79 | -0.61 % |
| 2014 | 59.15 | -0.58 % |
| 2013 | 59.49 | -0.29 % |
| 2012 | 59.67 | 0.48 % |
| 2011 | 59.38 | 0.46 % |
| 2010 | 59.11 |