68% (1986)

57% (1986)

69% (1985)

66% (1990)

73% (1987)

66% (1988)

66% (1987)

69% (1985)

77% (1986)

68% (1980)

60% (1982)

61% (1986)

63% (1989)

70% (1984)

63% (1992)

30% (1986)

59% (1984)

59% (1990)

60% (1984)

75% (1985)