the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 60.61 | -0.63 % |
| 2020 | 61.00 | 0.97 % |
| 2019 | 60.41 | 0.89 % |
| 2018 | 59.88 | 1.60 % |
| 2017 | 58.94 | 0.80 % |
| 2016 | 58.47 | 0.08 % |
| 2015 | 58.42 | 1.01 % |
| 2014 | 57.84 | 1.19 % |
| 2013 | 57.16 | 0.16 % |
| 2012 | 57.07 | 1.87 % |
| 2011 | 56.02 | 0.34 % |
| 2010 | 55.83 |