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
| Datum | Wert | Ändern , % |
|---|---|---|
| 2021 | 1.154 | 7,43 % |
| 2020 | 1.074 | -51,93 % |
| 2019 | 2.235 | 129,60 % |
| 2018 | 973 | 23,46 % |
| 2017 | 788 | 3,68 % |
| 2016 | 760 | 7,13 % |
| 2015 | 710 | 1,38 % |
| 2014 | 700 | -6,53 % |
| 2013 | 749 | 7,87 % |
| 2012 | 694 | 0,14 % |
| 2011 | 693 | -16,84 % |
| 2010 | 834 |