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 | 10.683 | 7,06 % |
| 2020 | 9.979 | -2,84 % |
| 2019 | 10.271 | -1,15 % |
| 2018 | 10.390 | 0,88 % |
| 2017 | 10.300 | 2,66 % |
| 2016 | 10.033 | 6,32 % |
| 2015 | 9.436 | 6,66 % |
| 2014 | 8.847 | 2,92 % |
| 2013 | 8.596 | -0,32 % |
| 2012 | 8.624 | -2,33 % |
| 2011 | 8.830 | -3,56 % |
| 2010 | 9.156 |