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 | 270.017 | 4,67 % |
| 2020 | 257.973 | 4,71 % |
| 2019 | 246.361 | 4,87 % |
| 2018 | 234.917 | 5,86 % |
| 2017 | 221.918 | 6,15 % |
| 2016 | 209.060 | 5,76 % |
| 2015 | 197.681 | 7,85 % |
| 2014 | 183.291 | 7,98 % |
| 2013 | 169.742 | 8,13 % |
| 2012 | 156.979 | 10,27 % |
| 2011 | 142.353 | 7,35 % |
| 2010 | 132.604 |