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
| Дата | Значение | Изменение , % |
|---|---|---|
| 2021 | 5 423 | -8,46% |
| 2020 | 5 924 | 11,10% |
| 2019 | 5 333 | 14,23% |
| 2018 | 4 668 | 18,97% |
| 2017 | 3 924 | -0,06% |
| 2016 | 3 926 | 2,18% |
| 2015 | 3 843 | 22,04% |
| 2014 | 3 149 | 37,38% |
| 2013 | 2 292 | 2,35% |
| 2012 | 2 239 | 13,02% |
| 2011 | 1 981 | -10,06% |
| 2010 | 2 203 |