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 | 10 324 | -0,67% |
| 2020 | 10 395 | -1,74% |
| 2019 | 10 579 | -1,29% |
| 2018 | 10 717 | 12,90% |
| 2017 | 9 492 | 10,75% |
| 2016 | 8 570 | 3,35% |
| 2015 | 8 293 | 8,63% |
| 2014 | 7 633 | 5,06% |
| 2013 | 7 266 | 3,29% |
| 2012 | 7 034 | 6,05% |
| 2011 | 6 633 | 5,42% |
| 2010 | 6 292 |