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 | 63 485 | 2,87% |
| 2020 | 61 713 | 2,35% |
| 2019 | 60 296 | 4,48% |
| 2018 | 57 709 | -3,77% |
| 2017 | 59 969 | -18,97% |
| 2016 | 74 006 | 7,20% |
| 2015 | 69 033 | 7,78% |
| 2014 | 64 050 | 7,17% |
| 2013 | 59 763 | 4,87% |
| 2012 | 56 986 | 15,87% |
| 2011 | 49 183 | 6,72% |
| 2010 | 46 085 |