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 | 4 675 | 8,65% |
| 2020 | 4 303 | -1,69% |
| 2019 | 4 377 | 5,12% |
| 2018 | 4 164 | 9,44% |
| 2017 | 3 805 | -13,53% |
| 2016 | 4 400 | 15,55% |
| 2015 | 3 808 | 3,24% |
| 2014 | 3 688 | -12,66% |
| 2013 | 4 223 | 10,19% |
| 2012 | 3 832 | -11,19% |
| 2011 | 4 315 | -4,47% |
| 2010 | 4 517 |