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 | 83 | 3.26% |
| 2020 | 80 | -4.91% |
| 2019 | 85 | 0.00% |
| 2018 | 85 | 5.35% |
| 2017 | 80 | -7.25% |
| 2016 | 86 | 0.72% |
| 2015 | 86 | 13.99% |
| 2014 | 75 | 27.83% |
| 2012 | 59 | 3.83% |
| 2011 | 57 | 24.28% |
| 2010 | 46 | 12.30% |
| 2009 | 41 |