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 | 1 200 | 9,95% |
| 2020 | 1 092 | 2,55% |
| 2019 | 1 064 | -3,45% |
| 2018 | 1 102 | 8,70% |
| 2017 | 1 014 | 5,64% |
| 2016 | 960 | 2,45% |
| 2015 | 937 | 1,43% |
| 2014 | 924 | 3,19% |
| 2013 | 895 | 4,98% |
| 2012 | 853 | 9,05% |
| 2011 | 782 | -2,77% |
| 2010 | 804 |