53% (1983)

55% (1977)

55% (1987)

69% (1986)

73% (1993)

20% (1980)

32% (1991)

73% (1989)

55% (1992)

50% (1988)

52% (1984)

58% (1980)

39% (1980)

50% (1982)

32% (1997)

54% (1991)

27% (1996)

40% (1987)

52% (1997)

55% (1984)