70% (1980)

79% (1983)

49% (2000)

61% (1980)

68% (1982)

71% (1981)

78% (1981)

45% (2007)

56% (1981)

62% (1981)

66% (1984)

41% (1984)

63% (1981)

61% (1982)

69% (1979)

57% (1983)

50% (1985)

0% (1982)