| I | London, U.K. | 1964 |
| II | London, U.K. | 1969 |
| III | Zagreb, Yugoslavi | 1970 |
| IV | Jerusalem, Israel | 1972 |
| V | Athens, Greece | 1974 |
| VI | Opatija, Yugoslavia | 1976 |
| VII | trsbon, Portugal | 1978 |
| VIII | Zagreb, Yugoslavia | 1981 |
| IX | Paris, France | 1982 |
| X | Osaka, Japan | 1983 |
| XI | Rio de Janeiro, Brazil | 1986 |
| XII | Washington, D.C., U.S.A. | 1990 |
| XIII | New Delhi, India | 1992 |
| XIV | Hamburg, Germany | 1994 |
| XV | Rome, Italy | 1995 |
| XVI | Vancouver, Canada | 1998 |
| XVII | Agra, India | 2001 |
| XVIII | Kobe, Japan | 2004 |
| XIX | Prague, Czech Repubtrc | 2007 |




