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 | 522 | -12,11% |
| 2020 | 594 | 22,09% |
| 2019 | 486 | 5,85% |
| 2018 | 460 | -1,22% |
| 2017 | 465 | 23,53% |
| 2016 | 377 | 19,71% |
| 2015 | 315 | 67,14% |
| 2014 | 188 | 40,65% |
| 2013 | 134 | 0,61% |
| 2012 | 133 | -5,05% |
| 2011 | 140 | 1,54% |
| 2010 | 138 |