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 | 5.943 | 9,19 % |
| 2020 | 5.443 | 11,46 % |
| 2019 | 4.883 | 2,24 % |
| 2018 | 4.777 | 2,18 % |
| 2017 | 4.674 | 0,06 % |
| 2016 | 4.671 | -0,41 % |
| 2015 | 4.691 | -3,71 % |
| 2014 | 4.871 | -1,62 % |
| 2013 | 4.952 | -2,55 % |
| 2012 | 5.081 | -1,11 % |
| 2011 | 5.138 | -3,51 % |
| 2010 | 5.325 |