| 2009 |
St. Louis (Missouri, U.S.A.) |
World Conference XVII |
| 2008 |
Tacoma (Washington, U.S.A.) |
World Conference XVI |
| 2007 |
Torino, Italy |
World Conference XV |
| 2006 |
Toronto (Ontario, Canada) |
World Conference XIV |
| 2005 |
Tucson (Arizona, U.S.A.) |
World Conference XIII |
| 2004 |
Boston (Massachusetts, U.S.A.) |
World Conference XII |
| 2003 |
Cupertino (California, U.S.A.) |
World Conference XI |
| 2002 |
Indianapolis (Indiana, U.S.A.) |
World Conference X |
| 2001 |
Albuquerque (New Mexico, U.S.A.) |
World Conference IX |
| 2000 |
New York (New York, U.S.A.) |
World Conference VIII |
| 1999 |
Tucson (Arizona, U.S.A.) |
World Conference VII |
| 1998 |
St. Louis (Missouri, U.S.A.) |
World Conference VI |
| 1997 |
Eugene (Oregon, U.S.A.) |
World Conference V |
| 1996 |
Cleveland (Ohio, U.S.A.) |
World Conference IV |
| 1995 |
San Francisco (California, U.S.A.) |
World Conference III |
| 1994 |
St. Louis (Missouri, U.S.A.) |
World Conference II |
| 1993 |
Washington (District of Columbia, U.S.A.) |
World Conference I |
