the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 67.25 | -0.71 % |
| 2020 | 67.73 | 1.00 % |
| 2019 | 67.06 | 1.81 % |
| 2018 | 65.86 | 0.62 % |
| 2017 | 65.46 | -0.54 % |
| 2016 | 65.81 | -0.20 % |
| 2015 | 65.95 | 1.73 % |
| 2014 | 64.82 | 0.30 % |
| 2013 | 64.63 | -0.03 % |
| 2012 | 64.65 | 1.20 % |
| 2011 | 63.88 | 0.39 % |
| 2010 | 63.63 |