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 | 2 409 | 2,24% |
| 2020 | 2 356 | 0,78% |
| 2019 | 2 338 | -8,22% |
| 2018 | 2 548 | 3,75% |
| 2017 | 2 455 | -2,42% |
| 2016 | 2 516 | -4,89% |
| 2015 | 2 646 | -10,34% |
| 2014 | 2 951 | -1,68% |
| 2013 | 3 001 | 2,84% |
| 2012 | 2 918 | 0,42% |
| 2011 | 2 906 | 12,16% |
| 2010 | 2 591 |