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 | 5 359 | -5,13% |
| 2020 | 5 649 | -25,71% |
| 2019 | 7 605 | 21,20% |
| 2018 | 6 274 | -15,05% |
| 2017 | 7 386 | 24,21% |
| 2016 | 5 947 | -37,41% |
| 2015 | 9 500 | 36,97% |
| 2014 | 6 936 | -12,96% |
| 2013 | 7 968 | 84,39% |
| 2012 | 4 322 | -9,07% |
| 2011 | 4 753 | 7,76% |
| 2010 | 4 410 |