2018 Rio Grande do Sul

2017 Malaysia

2016 Malaysia

2015 Beijing

2014 Central Texas Chapter

2013 Seoul Chapter

2012 Rio Grande do Sul Chapter

2011 Rio Grande do Sul Chapter

2010 Peru Chapter

2009 Macau Joint Chapter

2008 Singapore Chapter

2007 Malaysia Chapter

2006 Shanghai Chapter

2005 Greece Chapter

2004 France Chapter

2003 None awarded

2002 Delhi

2001 Moscow

2000 Thailand

1999 Argentina

1998 None awarded

1997 Hong Kong

1996 Houston

1995 Poland

1994 Turkey

1993 Dallas/Fort Worth

1992 Syracuse

1991 NJ Coast, Hong Kong, Switzerland

1986 Tokyo

1985 Dallas/Fort Worth