67% (1975)

66% (1987)

68% (1977)

63% (1976)

72% (1982)

53% (1992)

72% (1982)

74% (1982)

53% (1980)

72% (1979)

66% (1976)

58% (1991)

68% (1975)

80% (1978)

55% (1989)

64% (1984)

68% (1994)

67% (1979)

57% (1979)

59% (1978)