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 | 311 | -3,71% |
| 2020 | 323 | 31,42% |
| 2019 | 246 | -1,29% |
| 2018 | 249 | 4,89% |
| 2017 | 237 | -28,85% |
| 2016 | 333 | 41,61% |
| 2015 | 235 | -35,45% |
| 2014 | 365 | -46,84% |
| 2013 | 686 | 15,77% |
| 2011 | 593 | -7,55% |
| 2010 | 641 | -10,73% |
| 2009 | 718 |