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 | 3 599 | -0,07% |
| 2020 | 3 602 | 7,77% |
| 2019 | 3 342 | -0,77% |
| 2018 | 3 368 | 0,61% |
| 2017 | 3 347 | 5,00% |
| 2016 | 3 188 | 7,62% |
| 2015 | 2 962 | -4,38% |
| 2014 | 3 098 | 0,82% |
| 2013 | 3 073 | -3,88% |
| 2012 | 3 197 | -1,32% |
| 2011 | 3 240 | -2,27% |
| 2010 | 3 315 |