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 | 2 006 576 | 0,72% |
| 2020 | 1 992 236 | 3,11% |
| 2019 | 1 932 121 | 3,93% |
| 2018 | 1 859 027 | 2,70% |
| 2017 | 1 810 195 | 1,31% |
| 2016 | 1 786 860 | 0,52% |
| 2015 | 1 777 648 | 1,55% |
| 2014 | 1 750 505 | -0,38% |
| 2013 | 1 757 241 | -1,91% |
| 2012 | 1 791 396 | -0,83% |
| 2011 | 1 806 468 | 0,19% |
| 2010 | 1 802 992 |