77% (1974)

77% (1982)

73% (1979)

72% (1977)

73% (1972)

78% (1974)

66% (1978)

66% (1990)

62% (1979)

58% (1975)

56% (1973)

78% (1975)

67% (1979)

52% (1973)

0% (1972)

0% (1974)

0% (1975)

50% (1991)

0% (1990)

30% (1990)