Rank | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
---|---|---|---|---|---|---|
1 | Asia | Asia | Asia | Asia | Americas | Americas |
2 | Americas | Americas | Americas | Americas | Asia | Asia |
3 | Europe | Europe | Europe | Europe | Europe | Europe |
4 | Oceania | Oceania | Oceania | Africa | Oceania | Oceania |
5 | Africa | Africa | Africa | Oceania | Africa | Africa |