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 | 5 564 | -12,93% |
| 2020 | 6 390 | 21,07% |
| 2019 | 5 277 | 7,37% |
| 2018 | 4 915 | 0,71% |
| 2017 | 4 881 | 0,59% |
| 2016 | 4 852 | 4,01% |
| 2015 | 4 664 | 4,15% |
| 2014 | 4 479 | -9,40% |
| 2013 | 4 943 | 8,57% |
| 2012 | 4 553 | -1,83% |
| 2011 | 4 638 | 2,67% |
| 2010 | 4 517 |