79% (1983)

70% (1980)

49% (2000)

45% (2007)

68% (1982)

61% (1980)

78% (1981)

67% (1984)

41% (1984)

63% (1981)

56% (1981)

71% (1981)

62% (1981)

69% (1979)

60% (1982)

0% (1982)

57% (1983)

50% (1985)