the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 72.13 | 0.71 % |
| 2020 | 71.62 | 1.23 % |
| 2019 | 70.75 | 1.08 % |
| 2018 | 70.00 | -0.33 % |
| 2017 | 70.23 | 0.66 % |
| 2016 | 69.77 | 0.11 % |
| 2015 | 69.69 | 0.85 % |
| 2014 | 69.10 | 1.07 % |
| 2013 | 68.37 | 0.51 % |
| 2012 | 68.02 | 1.32 % |
| 2011 | 67.14 | -0.41 % |
| 2010 | 67.41 |