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
| Date | Valeur | Modifier , % |
|---|---|---|
| 2021 | 7 965 | -15,15 % |
| 2020 | 9 387 | 16,42 % |
| 2019 | 8 063 | 4,95 % |
| 2018 | 7 683 | -12,08 % |
| 2017 | 8 739 | 15,28 % |
| 2016 | 7 580 | -6,68 % |
| 2015 | 8 122 | 16,29 % |
| 2014 | 6 985 | -11,89 % |
| 2013 | 7 928 | 34,45 % |
| 2012 | 5 897 | 14,82 % |
| 2011 | 5 136 | 14,64 % |
| 2010 | 4 480 |