80% (1982)

80% (1995)

84% (1984)

67% (1984)

70% (1981)

61% (1985)

73% (2007)

61% (1982)

64% (1981)

64% (1983)

74% (1983)

53% (1996)

68% (2005)

56% (1984)

59% (1996)

61% (1981)

61% (1995)

56% (1984)

66% (1983)

45% (1985)