the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 82.89 | -0.30 % |
| 2020 | 83.14 | -0.12 % |
| 2019 | 83.24 | 0.52 % |
| 2018 | 82.81 | 0.33 % |
| 2017 | 82.54 | -0.18 % |
| 2016 | 82.68 | 0.37 % |
| 2015 | 82.38 | 0.19 % |
| 2014 | 82.23 | -0.08 % |
| 2013 | 82.29 | 0.52 % |
| 2012 | 81.87 | 0.15 % |
| 2011 | 81.74 | 0.18 % |
| 2010 | 81.60 |