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 | 2 407 | -14,99% |
| 2020 | 2 831 | -2,31% |
| 2019 | 2 898 | -9,02% |
| 2018 | 3 185 | -11,02% |
| 2017 | 3 580 | 10,07% |
| 2016 | 3 252 | -2,71% |
| 2015 | 3 343 | -0,97% |
| 2014 | 3 375 | 3,45% |
| 2013 | 3 263 | 12,05% |
| 2012 | 2 912 | -1,23% |
| 2011 | 2 948 | -1,43% |
| 2010 | 2 991 |