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 , % |
|---|---|---|
| 2014 | NaN | |
| 2014 | 3,542 | |
| 2013 | NaN | |
| 2013 | 3,682 | |
| 2012 | NaN | |
| 2012 | 4,002 | |
| 2011 | NaN | |
| 2011 | 4,368 | |
| 2010 | NaN | |
| 2010 | 4,817 | |
| 2009 | NaN | |
| 2009 | 4,854 |