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 | 351 | -3,68% |
| 2020 | 364 | 5,10% |
| 2019 | 347 | 1,21% |
| 2018 | 343 | 8,97% |
| 2017 | 314 | -2,99% |
| 2016 | 324 | -7,07% |
| 2015 | 349 | 9,75% |
| 2014 | 318 | 5,52% |
| 2013 | 301 | 10,00% |
| 2012 | 274 | 14,62% |
| 2011 | 239 | 13,93% |
| 2010 | 210 |