the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 80.12 | -0.70 % |
| 2020 | 80.68 | -0.26 % |
| 2019 | 80.89 | 0.52 % |
| 2018 | 80.47 | 0.31 % |
| 2017 | 80.23 | 0.69 % |
| 2016 | 79.68 | 0.94 % |
| 2015 | 78.94 | 0.34 % |
| 2014 | 78.67 | 0.52 % |
| 2013 | 78.26 | -0.27 % |
| 2012 | 78.48 | -0.07 % |
| 2011 | 78.53 | -0.37 % |
| 2010 | 78.82 |