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
| 日付 | 値 | 変更 , % |
|---|---|---|
| 2021 | 890 | -4.75% |
| 2020 | 934 | -38.94% |
| 2019 | 1,530 | -9.55% |
| 2018 | 1,692 | -49.05% |
| 2017 | 3,320 | 29.81% |
| 2016 | 2,558 | 4.80% |
| 2015 | 2,441 | -52.63% |
| 2009 | 5,153 | -2.48% |
| 2008 | 5,283 | 20.63% |
| 2007 | 4,380 | 26.64% |
| 2006 | 3,458 | 17.62% |
| 2005 | 2,940 |