Original: Castricum), Netherlands, 19 participants from 7 countries 1995: Elsnigk, Germany 1991: Ostend, Belgium, 21 participants 1980: Namur, Belgium, 35 participants 1960: Zürich, Switzerland, ca.
Simplified: Castricum), Netherlands - 19 participants from 7 countries 1995: Elsnigk, Germany 1991: Ostend, Belgium - 21 people 1980: Namur, Belgium - 35 people 1960: Zürich, Switzerland - ca.