| November 2000 - July 2007 |
August 1999 - November 2000 |
| February 1998 - August 1999 |
July 1996 - February 1998 |
| July 1995 - July 1996 |
January 1995 - July 1995 |
| April 1994 - January 1995 |
July 1993 - April 1994 |
| October 1992 - July 1993 |
February 1992 - September 1992 |
| August 1991 - February 1992 |
March 1991 - August 1991 |
| January 1991 - March 1991 |
September 1990 - January 1991 |
| April 1990 - September 1990 |
November 1989 - April 1990 |
| May 1989 - November 1989 |
November 1988 - May 1989 |
| May 1988 - November 1988 |
November 1987 - May 1988 |
| June 1987 - November 1987 |
October 1986 - June 1987 |
| April 1986 - October 1986 |
November 1985 - April 1986 |
| April 1985 - November 1985 |
November 1984 - April 1985 |
| May 1984 - November 1984 |
January 1984 - May 1984 |
| September 1983 - January 1984 |
April 1983 - September 1983 |
| November 1982 - April 1983 |
July 1982 - November 1982 |
| March 1982 - June 1982 |
December 1981 - March 1982 |
| September 1981 - December 1981 |
July 1981 - September 1981 |
| April 1981 - July 1981 |
January 1981 - April 1981 |
| November 1980 - January 1981 |
September 1980 - November 1980 |
| May 1980 - September 1980 |
February 1980 - May 1980 |
| August 1979 - February 1980 |
August 1978 - July 1979 |
| January 1978 - August 1978 |
June 1977 - January 1978 |
| November 1976 - June 1977 |
June 1976 - November 1976 |
| January 1976 - June 1976 |
August 1975 - December 1975 |
| February 1975 - August 1975 |
September 1974 - February 1975 |
| May 1974 - September 1974 |
December 1973 - May 1974 |
| August 1973 - December 1973 |
February 1973 - August 1973 |
| July 1972 - February 1973 |
December 1971 - July 1972 |
| February 1971 - December 1971 |
September 1970 - February 1971 |
| March 1970 - September 1970 |
August 1969 - March 1970 |
| February 1969 - August 1969 |
October 1968 - February 1969 |
| August 1968 - October 1968 |
May 1968 - August 1968 |
| February 1968 - May 1968 |
January 1968 - February 1968 |
| October 1967 - January 1968 |
August 1967 - October 1967 |
| June 1967 - August 1967 |
March 1967 - June 1967 |
| October 1966 - March 1967 |
May 1966 - October 1966 |
| February 1966 - May 1966 |
September 1965 - February 1966 |
| May 1965 - September 1965 |
February 1965 - May 1965 |
| October 1964 - February 1965 |
June 1964 - October 1964 |
| February 1964 - June 1964 |
November 1963 - February 1964 |
| July 1963 - November 1963 |
April 1963 - July 1963 |
| February 1963 - April 1963 |
December 1962 - February 1963 |
| October 1962 - December 1962 |
July 1962 - October 1962 |
| May 1962 - July 1962 |
March 1962 - May 1962 |
| December 1961 - March 1962 |
September 1961 - December 1961 |
| May 1961 - September 1961 |
February 1961 - May 1961 |
| October 1960 - February 1961 |
July 1960 - October 1960 |
| April 1960 - July 1960 |
September 1959 - April 1960 |
| March 1959 - September 1959 |
July 1958 - March 1959 |
| September 1957 - July 1958 |
November 1956 - September 1957 |
| May 1956 - November 1956 |
June 1955 - May 1956 |
| October 1954 - June 1955 |
July 1954 - October 1954 |
| June 1954 - July 1954 |
June 1954 - June 1954 |
| June 1954 - June 1954 |
June 1954 - June 1954 |
| June 1954 - June 1954 |
May 1954 - June 1954 |
| May 1954 - May 1954 |
May 1954 - May 1954 |
| May 1954 - May 1954 |
April 1954 - May 1954 |
| April 1954 - April 1954 |
April 1954 - April 1954 |
| March 1954 - March 1954 |
March 1954 - March 1954 |
| February 1954 - March 1954 |
January 1954 - February 1954 |
| January 1954 - January 1954 |
November 1953 - January 1954 |
| August 1953 - November 1953 |
April 1953 - August 1953 |
| October 1952 - March 1953 |
November 1951 - October 1952 |
| September 1950 - November 1951 |
December 1949 - September 1950 |
| January 1949 - December 1949 |
February 1948 - January 1949 |
| August 1945 - February 1948 |
March 1945 - August 1945 |
| January 1945 - March 1945 |
June 1944 - January 1945 |
| January 1942 - June 1944 |
