June 4- 9 1998 Takayama, Japan
June 16-21 2000 Sudbury, Canada
May 25-30 2002 Munich, Germany
June 13-19 2004 Paris, France
June 13-19 2006 Santa Fe, USA
May 25-31 2008 Christchurch, New Zealand
June 14-19 2010 Athens, Greece
