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 | 491 | 1,48% |
| 2020 | 483 | 3,07% |
| 2019 | 469 | 8,25% |
| 2018 | 433 | 18,11% |
| 2017 | 367 | 18,64% |
| 2016 | 309 | -8,36% |
| 2015 | 337 | 11,98% |
| 2014 | 301 | -5,70% |
| 2013 | 320 | -9,77% |
| 2012 | 354 | -8,70% |
| 2011 | 388 | -7,35% |
| 2010 | 419 |