(1906–1998)
8 February 1963 (removed by coup)
(1926–2003)
27 July 1963
(1921–2009)
23 February 1966
(1929–1992)
12 March 1971
(1926–1993)
2 December 1992
(b. 1937)
2 December 1999
(b. 1932)
1 December 2002
(b. 1962)
present