| Year | Location City | Location Country | Number of Participants |
|---|---|---|---|
| 1979 | Paris | France | 10 |
| 1980 | Montreal | Canada | 10 |
| 1986 | Dubrovnik | Croatia | 50 |
| 1986 | Napa Valley | USA | 60 |
| 1988 | Barcelona | Spain | 8 |
| 1989 | Surrey | England | 20 |
| 1989 | Paris | France | 60 |
| 1991 | Stiges/Barcelona | Spain | 60 |
| 1994 | Saint Louis | USA | 60 |
| 1997 | Heraklion, Crete | Greece | 200 |
| 1999 | Paris | France | 250 |
| 2002 | San Diego | USA | 250 |
| 2003 | Stresa | Italy | 400 |
| 2005 | New York (Brooklyn) | New York | 500 |
| 2007 | London | UK | 800 |
| 2009 | Barcelona | Spain | 1,148 |
| 2011 | Houston | USA | 566 |
| 2013 | Cologne | Germany | 993 |
| 2015 | Sydney | Australia | 650 |
| 2017 | New York | USA | 1,200 |
Previous Biennial Meetings
Biennial Meetings held between 1979 and 2017.