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 | 17 575 | 11,06% |
| 2020 | 15 825 | -3,01% |
| 2019 | 16 317 | -17,89% |
| 2018 | 19 871 | -15,40% |
| 2017 | 23 488 | 12,51% |
| 2016 | 20 875 | 14,80% |
| 2015 | 18 184 | 6,33% |
| 2014 | 17 102 | -0,29% |
| 2013 | 17 152 | -19,47% |
| 2012 | 21 299 | 4,11% |
| 2011 | 20 458 | -13,69% |
| 2010 | 23 703 |