Term of office: 1910-1912
Term of office: 1913-1917
Term of office: 1917-1918
Term of office: 1917-1920
Term of office: 1920-1923, 1925-1927, 1929-1934
Term of office: 1935-1938
Term of office: 1945
Term of office: 1945-1954, 1955-1958
Term of office: 1954, 1955
Term of office: 1958-1960
Term of office: 1960-1963
Term of office: 1963-1965
Term of office: 1965-1969
Term of office: 1969
Term of office: 1969-1970
Term of office: 1970-1973, 1973-1976
Term of office: 1977-1982
Term of office: 1982-1987
Term of office: 1987-1988
Term of office: 1988-1991
Term of office: 1991-1992
Term of office: 1992-1993
Term of office: 1993-1995
Term of office: 1995-1996
Term of office: 1996-1999
Term of office: 1999-2005
Term of office: 2005-2011
Term of office: 2011-2017