Period in office : 27 Nov.1942 - 16 Oct. 1946
Period in office : 17 Oct. 1946 - 24 Nov. 1947
Period in office : 25 Nov.1947 - 2 Sept.1948
Period in office : 3 Sept.1948 - 2 Dec.1948
Period in office : 3 Dec.1948 - 3 Aug.1949
Period in office : 1 Mar. 1952 - 24 Jul. 1955
Period in office : 25 Jul. 1955 - 23 Jul. 1958
Period in office : 24 Jul. 1958 - 3 May 1959
Period in office : 11 Jun. 1959 - 15 Aug. 1971
Period in office : 16 Aug. 1971 - 23 May 1975
Period in office : 24 May 1975 - 31 Oct. 1979
Period in office : 1 Nov. 1979 - 13 Sep. 1984
Period in office : 14 Sep. 1984 - 5 Mar. 1990
Period in office : 6 Mar. 1990 - 30 Sep. 1990
Period in office : 1 Oct. 1990 - 1 Jul. 1996
Period in office : 13 Jul. 1996 - 28 Jul. 1997
Period in office : 31 Jul. 1997 - 4 May 1998
Period in office : 7 May 1998 - 30 May 2001
Period in office : 31 May 2001 - 6 Oct. 2006
Period in office : 8 Nov. 2006 - 30 Sep. 2010
Period in office : 1 Oct. 2015