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 | 3 899 | 4,45% |
| 2020 | 3 733 | 0,48% |
| 2019 | 3 715 | 17,07% |
| 2018 | 3 173 | -31,09% |
| 2017 | 4 605 | 26,88% |
| 2016 | 3 629 | 2,96% |
| 2015 | 3 525 | 9,43% |
| 2014 | 3 221 | -7,23% |
| 2013 | 3 472 | 14,15% |
| 2012 | 3 042 | 1,54% |
| 2011 | 2 996 | 1,59% |
| 2010 | 2 949 |