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 | 557 | -6,99 % |
| 2020 | 599 | 1,86 % |
| 2019 | 588 | 5,12 % |
| 2018 | 559 | 12,07 % |
| 2017 | 499 | 10,91 % |
| 2016 | 450 | 5,45 % |
| 2015 | 427 | 7,37 % |
| 2014 | 398 | 15,45 % |
| 2013 | 344 | -1,89 % |
| 2012 | 351 | 12,78 % |
| 2011 | 311 | -7,19 % |
| 2010 | 335 |