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 | 6 654 | -8,46% |
| 2020 | 7 269 | 0,48% |
| 2019 | 7 234 | 2,03% |
| 2018 | 7 090 | 2,13% |
| 2017 | 6 942 | 3,09% |
| 2016 | 6 734 | 5,60% |
| 2015 | 6 377 | 6,31% |
| 2014 | 5 999 | 0,73% |
| 2013 | 5 956 | 3,95% |
| 2012 | 5 730 | -1,42% |
| 2011 | 5 812 | 2,99% |
| 2010 | 5 644 |