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 | 53 560 | 1,54% |
| 2020 | 52 747 | 2,88% |
| 2019 | 51 270 | 1,65% |
| 2018 | 50 437 | -2,47% |
| 2017 | 51 713 | 1,32% |
| 2016 | 51 041 | 3,88% |
| 2015 | 49 136 | 2,74% |
| 2014 | 47 828 | 1,74% |
| 2013 | 47 010 | -0,65% |
| 2012 | 47 316 | -1,54% |
| 2011 | 48 054 | -2,97% |
| 2010 | 49 527 |