Pattern of sessions 1988, 1990, 1991, 1993, 1994, 1996, 1997, 1999, 2000, 2002, 2003, 2005, 2006, 2008, 2009, 2011, 2012 and 2014
Periodicidad de las reuniones 1988, 1990, 1991, 1993, 1994, 1996, 1997, 1999, 2000, 2002, 2003, 2005, 2006, 2008, 2009, 2011, 2012 y 2014