1998 (BVI)
1999 (Tanzania, Kenya)
2000 (Germany, Nepal)
2001 (Thailand, Cambodia, Guatemala)
2002 (Peru)
2003 (Egypt)
2004 (India)
2005 (Burma)
2006 (Botswana, South Africa)
2007 (Palau)
2007 (Italy)
2008 (Paris)
2009 (Costa Rica)
2010 (Spain)
2011 (Jordan)
2012 (France)
2013 (Bhutan)
2013 (France)
2014 (Greece, Italy)
2015 (Sri Lanka, Germany)
2016 (Morocco, Patagonia)
2017 (Tanzania)

British Virgin Islands
Bhutan
Botswana
Burma
Cambodia
Costa Rica
Egypt
France (Paris, Bordeaux, Loire)
Germany (West, East)
Greece
Guatemala
India
Italy (Tuscany, Puglia)
Jordan
Kenya
Morocco
Nepal
Palau
Patagonia
Peru
Spain
Sri Lanka
Tanzania (1999, 2017)
Thailand