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 | 434 | 6,88% |
| 2020 | 406 | 2,35% |
| 2019 | 396 | 12,65% |
| 2018 | 352 | 2,94% |
| 2017 | 342 | 32,91% |
| 2016 | 257 | -5,61% |
| 2015 | 273 | 17,86% |
| 2014 | 231 | 7,28% |
| 2013 | 216 | 3,59% |
| 2012 | 208 | -2,59% |
| 2011 | 214 | -13,64% |
| 2010 | 247 |