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 | 16 709 | -4,40% |
| 2020 | 17 478 | -5,87% |
| 2019 | 18 568 | 6,30% |
| 2018 | 17 467 | 26,93% |
| 2017 | 13 762 | 7,33% |
| 2016 | 12 822 | 17,24% |
| 2015 | 10 936 | 2,90% |
| 2014 | 10 628 | 0,73% |
| 2013 | 10 551 | 2,70% |
| 2012 | 10 273 | 2,45% |
| 2011 | 10 027 | 0,86% |
| 2010 | 9 942 |