58% (1968)

80% (1985)

68% (1972)

50% (1997)

50% (1965)

50% (1985)

0% (1974)

70% (1964)

70% (1970)

60% (1973)

50% (1964)

72% (1967)

57% (1982)

70% (1983)

55% (1981)

50% (1978)

67% (1977)

60% (1964)

63% (1959)

67% (1984)