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)...
