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
| Дата | Значение | Изменение , % |
|---|---|---|
| 2021 | 11 265 | 433,78% |
| 2010 | 2 110 | -1,28% |
| 2009 | 2 138 | -11,63% |
| 2008 | 2 419 | 28,94% |
| 2007 | 1 876 | 28,86% |
| 2006 | 1 456 | 7,37% |
| 2005 | 1 356 | 5,60% |
| 2004 | 1 284 | -7,83% |
| 2003 | 1 393 | 0,82% |
| 2002 | 1 382 | -33,35% |
| 1991 | 2 073 | 8,47% |
| 1990 | 1 911 |