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 | 2 608 | -5,88% |
| 2020 | 2 771 | 38,54% |
| 2019 | 2 000 | 19,16% |
| 2018 | 1 679 | 16,84% |
| 2017 | 1 437 | 8,48% |
| 2016 | 1 324 | 14,24% |
| 2015 | 1 159 | 12,48% |
| 2014 | 1 031 | -1,50% |
| 2013 | 1 046 | -5,44% |
| 2012 | 1 107 | -4,81% |
| 2011 | 1 163 | 1,38% |
| 2010 | 1 147 |