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 | 1 542 | -0,39% |
| 2020 | 1 548 | -15,47% |
| 2019 | 1 831 | 30,57% |
| 2018 | 1 403 | 7,70% |
| 2017 | 1 302 | -3,98% |
| 2016 | 1 356 | -13,03% |
| 2014 | 1 560 | -0,33% |
| 2013 | 1 565 | 12,82% |
| 2012 | 1 387 | 16,70% |
| 2011 | 1 189 | 10,21% |
| 2010 | 1 079 | 9,84% |
| 2009 | 982 |