Year Continent | 2015 | 2030 | 2050 |
Americas | 9.4 (20.1%) | 15.8 (21.2%) | 29.9 (22.7%) |
Europe | 10.5 (22.5%) | 13.4 (17.9%) | 18.6 (14.2%) |
Asia | 22.9 (48.9%) | 38.5 (51.5%) | 67.2 (51.1%) |
Africa | 4.0 (8.5%) | 7.0 (9.4%) | 15.8 (12%) |
World | 46.8 | 74.7 | 131.5 |