76% (1981)

76% (1970)

75% (1978)

75% (1972)

72% (1982)

72% (1982)

62% (1974)

74% (1996)

73% (1977)

70% (1978)

50% (1974)

56% (1990)

60% (1984)

53% (1990)

0% (1979)

60% (1990)

81% (1994)

50% (1988)

50% (1979)

50% (1977)