11-15 October, 2010

• Melbourne 2008, Australia
• Muenich 2006, Germany
• San Juan 2004, Puerto Rico
• Vietri sul mare 2002, Italy
• Rio de Janeiro 2000, Brazil
• Batavia 1998, USA
• St. Goar 1996, Germany
• Charlottesville 1994, USA
• Frascati 1993, Italy