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
| التاريخ | Value | تغيير , % |
|---|---|---|
| 2021 | 254 | 19.80 % |
| 2020 | 212 | -11.17 % |
| 2019 | 239 | -12.62 % |
| 2018 | 273 | 14.83 % |
| 2017 | 238 | -2.65 % |
| 2016 | 244 | -18.50 % |
| 2015 | 300 | 6.98 % |
| 2014 | 280 | 23.04 % |
| 2013 | 228 | 7.91 % |
| 2012 | 211 | 11.32 % |
| 2011 | 190 | 5.03 % |
| 2010 | 181 |