13th General Esssembly (2023-)...
12th Secretary General (2019-2023)...
11th Secretary General (2014-2019)...
10th Secretary General (2010-2014)...
9th Secretary General (2006-2010)...
8th Secretary General (1998-2006)...
7th Secretary General (1992-1998)...
6th Secretary General (1988-1992)...
5th Secretary General (1984-1988)...
4th Secretary General (1980-1984)...
