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 , % |
|---|---|---|
| 2014 | 24.564 | -5,63 % |
| 2013 | 26.031 | 22,50 % |
| 2012 | 21.250 | -1,47 % |
| 2011 | 21.568 | 8,63 % |
| 2010 | 19.855 | 25,41 % |
| 2009 | 15.832 | 17,73 % |
| 2008 | 13.447 | 21,82 % |
| 2007 | 11.039 | 6,26 % |
| 2006 | 10.389 | -0,72 % |
| 2005 | 10.464 | -8,77 % |
| 2004 | 11.471 | 11,23 % |
| 2003 | 10.313 |