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 | 601 | -5,23% |
| 2020 | 634 | -2,86% |
| 2019 | 653 | 24,58% |
| 2018 | 524 | 12,88% |
| 2017 | 464 | 2,36% |
| 2016 | 453 | -1,68% |
| 2015 | 461 | 8,25% |
| 2014 | 426 | 1,54% |
| 2013 | 420 | 12,58% |
| 2012 | 373 | 2,39% |
| 2011 | 364 | -8,37% |
| 2010 | 397 |