50% (1992)

50% (1974)

48% (1967)

55% (1972)

51% (1967)

40% (1983)

50% (1979)

45% (1967)

50% (1957)

50% (1965)

50% (1983)

49% (1968)

50% (1964)

50% (1967)

45% (1973)

50% (1958)

52% (1961)

37% (1974)

0% (1961)

0% (1951)