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 | 1 185 | 5,70% |
| 2020 | 1 121 | -5,16% |
| 2019 | 1 182 | 43,89% |
| 2018 | 822 | -8,15% |
| 2017 | 894 | 7,34% |
| 2016 | 833 | -0,82% |
| 2015 | 840 | -3,76% |
| 2014 | 873 | 0,98% |
| 2013 | 865 | -3,15% |
| 2012 | 893 | -3,33% |
| 2011 | 923 | -3,96% |
| 2010 | 961 |