| Took Office | Prime Minister | Political Party |
| 3rd May 1920 | |
| 24th Jan 1921 | |
| 12th July 1922 | |
| 14th August 1923 | |
| 1st November 1923 | |
| 21st November 1924 | |
| 6th March 1925 | |
| 27 September 1937 | |
| 25 January 1939 | |
| 8 July 1942 | |
| 9 July 1942 | |
| 7 August 1946 | |
| 10 September 1947 | |
| 16 January 1949 | |
| 22 May 1950 | |
| 28 May 1960 | |
| 20 November 1961 | |
| 20 February 1965 | |
| 27 October 1965 | |
| 26 March 1971 | |
| 17 April 1972 | |
| 15 April 1973 | |
| | Took Office | Prime Minister | Political Party |
| 25 January 1974 | |
| 17 November 1974 | |
| 31 March 1975 | |
| 21 June 1977 | |
| 21 July 1977 | |
| 5 January 1978 | |
| 12 November 1979 | |
| 20 September 1980 | |
| 13 December 1983 | |
| 21 December 1987 | |
| 31 October 1989 | |
| 9 November 1989 | |
| 23 June 1991 | |
| 20 November 1991 | |
| 16 May 1993 | |
| 25 June 1993 | |
| 6 March 1996 | |
| 28 June 1996 | |
| 30 June 1997 | |
| 11 January 1999 | |
| 18 November 2002 | |
| 14 March 2003 | |
|