the highest = the best
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 42.76 | 0.74 % |
| 2020 | 42.44 | 1.71 % |
| 2019 | 41.73 | 3.27 % |
| 2018 | 40.41 | 0.17 % |
| 2017 | 40.34 | 0.22 % |
| 2016 | 40.25 | 2.07 % |
| 2015 | 39.43 | -0.20 % |
| 2014 | 39.51 | -1.45 % |
| 2013 | 40.09 | 0.59 % |
| 2012 | 39.86 | 0.28 % |
| 2011 | 39.74 | 1.44 % |
| 2010 | 39.18 |