Figures in constant (2020) US$ are present according to calendar year, calculated on the assumption that, where financial years do not correspond to calendar years, spending is distributed evenly through the year
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 12,090 | 1.40 % |
| 2020 | 11,924 | 3.49 % |
| 2019 | 11,522 | 6.65 % |
| 2018 | 10,803 | -2.16 % |
| 2017 | 11,041 | 1.33 % |
| 2016 | 10,896 | -1.72 % |
| 2015 | 11,087 | 5.39 % |
| 2014 | 10,520 | -0.58 % |
| 2013 | 10,581 | -5.56 % |
| 2012 | 11,204 | 3.52 % |
| 2011 | 10,823 | 0.95 % |
| 2010 | 10,720 |