62% (1985)

70% (1977)

67% (1978)

70% (1976)

60% (1988)

58% (1976)

60% (1983)

63% (1988)

45% (1990)

67% (1982)

80% (1985)

75% (1974)

57% (1985)

60% (1979)

73% (1980)

57% (1979)

68% (1979)

60% (1975)

63% (1986)

60% (1981)