| Xth | Year | Hosting country (city) | Participants | Continent |
|---|---|---|---|---|
| 22 | 2024 | Korea, Jeju | - | Asia |
| 21 | 2021 | Canada | - | America |
| 20 | 2018 | Italy (Florence) | - | Europe |
| 19 | 2015 | Australia (Melbourne) | 881 | Oceania |
| 18 | 2012 | Brazil (Recife) | 2,000 | America |
| 17 | 2009 | China (Beijing) | - | Asia |
| 16 | 2006 | Netherlands (Maastricht) | 1,500 | Europe |
| 15 | 2003 | South Korea (Seoul) | 1,500 | Asia |
| 14 | 2000 | USA (San Diego) | 3,000 | America |
| 13 | 1997 | Finland (Tampere) | 1,600 | Europe |
| 9 | 1985 | United Kingdom (Bournemouth) | 637 | Europe |
| 8 | 1982 | Japan (Tokyo) | 598 | Asia |
| 7 | 1979 | Poland (Warszawa) | 577 | Europe |
| 6 | 1976 | USA (College Part) | 700 | America |
| 5 | 1973 | Netherlands (Amsterdam) | - | Europe |
| 4 | 1970 | France (Strasbourg) | - | Europe |
| 3 | 1967 | United Kingdom (Birmingham) | - | Europe |
| 2 | 1964 | Germany (Dortmund) | - | Europe |
| 1 | 1961 | Sweden (Stockholm) | - | Europe |