71% (1980)

78% (1983)

49% (2000)

61% (1980)

79% (1981)

68% (1982)

45% (2007)

57% (1981)

71% (1981)

41% (1984)

62% (1981)

64% (1981)

66% (1984)

61% (1982)

70% (1979)

57% (1983)

0% (1982)

50% (1985)