the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 67.96 | 1.37 % |
| 2020 | 67.04 | 0.40 % |
| 2019 | 66.77 | 0.21 % |
| 2018 | 66.63 | 1.05 % |
| 2017 | 65.94 | -0.14 % |
| 2016 | 66.04 | 0.71 % |
| 2015 | 65.57 | 0.45 % |
| 2014 | 65.28 | 1.05 % |
| 2013 | 64.60 | 1.17 % |
| 2012 | 63.85 | -1.06 % |
| 2011 | 64.54 | 0.07 % |
| 2010 | 64.49 |