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 | 3 021 | -0,45% |
| 2020 | 3 035 | 3,54% |
| 2019 | 2 931 | 19,16% |
| 2018 | 2 460 | 10,37% |
| 2017 | 2 228 | 6,72% |
| 2016 | 2 088 | 7,25% |
| 2015 | 1 947 | 1,38% |
| 2014 | 1 921 | 4,06% |
| 2013 | 1 846 | -0,49% |
| 2012 | 1 855 | -2,82% |
| 2011 | 1 909 | -5,54% |
| 2010 | 2 021 |