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 | 30 265 | 4,65% |
| 2020 | 28 921 | 7,83% |
| 2019 | 26 822 | -2,73% |
| 2018 | 27 576 | 1,00% |
| 2017 | 27 303 | 2,87% |
| 2016 | 26 540 | 13,28% |
| 2015 | 23 428 | -4,25% |
| 2014 | 24 467 | -7,68% |
| 2013 | 26 504 | -3,83% |
| 2012 | 27 559 | -7,56% |
| 2011 | 29 814 | -2,07% |
| 2010 | 30 444 |