64% (1976)

28% (2001)

64% (1972)

66% (2001)

58% (1965)

54% (1972)

46% (1962)

44% (1991)

46% (2001)

80% (1960)

20% (2006)

64% (1975)

74% (1959)

50% (1982)

40% (1979)

80% (1988)

60% (1981)

50% (1979)

89% (1984)

79% (1978)