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 | 62.489 | 2,99 % |
| 2020 | 60.675 | 5,13 % |
| 2019 | 57.713 | 4,97 % |
| 2018 | 54.979 | 1,34 % |
| 2017 | 54.254 | -0,67 % |
| 2016 | 54.618 | -0,35 % |
| 2015 | 54.810 | -3,84 % |
| 2014 | 57.001 | -1,79 % |
| 2013 | 58.038 | -3,66 % |
| 2012 | 60.241 | -2,78 % |
| 2011 | 61.961 | -3,38 % |
| 2010 | 64.129 |