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 | 28 398 | 4,02% |
| 2020 | 27 301 | 4,89% |
| 2019 | 26 029 | 2,71% |
| 2018 | 25 342 | -2,39% |
| 2017 | 25 962 | -0,18% |
| 2016 | 26 008 | 9,50% |
| 2015 | 23 751 | 10,23% |
| 2014 | 21 546 | 8,53% |
| 2013 | 19 852 | -0,87% |
| 2012 | 20 026 | -3,50% |
| 2011 | 20 754 | -1,39% |
| 2010 | 21 045 |