- Houston, Texas, USA (1961)
- Lomé, Togo (1966)
- Manila, Philippines (1966)
- Cotonou, Benin (1967)
- Seoul, South Korea (1968)
- Quezon City, Philippines (1968)
- Saigon, South Vietnam (1968)[3]
- San Francisco, California, USA (1970)
- Santo Domingo, Dominican Republic (1970)
- Guam, (1973)
- Tegucigalpa, Honduras (1975)
- Cleveland, Ohio, USA (1975)
- Jeddah, Saudi Arabia (1978)
- Indianapolis, Indiana, USA (1978)
- Marshall, Texas, USA (1978)
- Phoenix, Arizona, USA (1979)
- Los Angeles, California, USA (1979)
- Atlanta, Georgia, USA (1979)
- Oklahoma City, Oklahoma, USA (1981)
- Johannesburg, South Africa (1982)
- Gold Coast, Australia (1982)
- Pretoria, South Africa (1983)
- San José, Costa Rica (1984)
- Lilongwe, Malawi (1984)
|
- Versailles, France (1986)
- Asunción, Paraguay (1987)
- Panama City, Panama (1989)
- Managua, Nicaragua (1992)
- San Salvador, El Salvador (1993)
- Warsaw, Poland (1995)[4]
- Ulan-Ude, Russia (1996)
- Boston, Massachusetts, USA (1997)
- Dallas, Texas, USA (1997)
- Dakar, Senegal (1997)
- Banjul, Gambia (1997)
- Bissau, Guinea-Bissau (1997)
- Mbabane, Swaziland (1997)
- Ulan Bator, Mongolia (1997)
- San Nicolás, Mexico (1997)
- La Paz, Bolivia (1997)
- Guatemala City, Guatemala (1998)
- Monrovia, Liberia (1998)
- Vilnius, Lithuania (1998)
- Majuro, Marshall Islands (1998)
- Riga, Latvia (2001)[5]
- Ouagadougou, Burkina Faso (2008)
- Daegu, South Korea (2010)
|
