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 | 5.509 | -9,62 % |
| 2020 | 6.096 | -6,10 % |
| 2019 | 6.492 | -13,52 % |
| 2018 | 7.507 | 10,24 % |
| 2017 | 6.810 | -15,63 % |
| 2016 | 8.071 | 4,19 % |
| 2015 | 7.747 | -8,34 % |
| 2014 | 8.451 | -7,25 % |
| 2013 | 9.113 | -6,22 % |
| 2012 | 9.717 | 79,69 % |
| 2011 | 5.407 | 30,92 % |
| 2010 | 4.130 |