| 1964: | Oberlin |
| 1965: | Philadelphia |
| 1966: | San Francisco |
| 1967: | New Orleans |
| 1968: | Boston |
| 1969: | London |
| 1970: | Chicago |
| 1971: | Los Angeles |
| 1972: | Mexico City |
| 1973: | Atlanta |
| 1974: | Denver |
| 1975: | Vancouver |
| 1976: | Palm Beach |
| 1977: | Minneapolis |
| 1978: | San Francisco |
| 1979: | Chicago |
| 1980: | Toronto |
| 1981: | Los Angeles & Florence |
| 1982: | Washington |
| 1983: | Dallas |
| 1984: | Amsterdam |
|
| 1985: | Banff |
| 1986: | Boston |
| 1987: | London & Cleveland |
| 1988: | Seattle |
| 1989: | Ottawa |
| 1990: | Chicago |
| 1991: | New Orleans |
| 1992: | San Francisco |
| 1993: | Madrid |
| 1994: | Minneapolis |
| 1995: | Montreal |
| 1996: | Washington & Lisbon |
| 1997: | San Antonio |
| 1998: | St. Louis |
| 1999: | Auckland & Pittsburgh |
| 2000: | Miami |
| 2001: | Long Beach |
| 2002: | Toronto & Rome/Florence |
| 2003: | Fort Worth |
| 2004: | Philadelphia |
| 2005: | London & Scottsdale |
|
