53% (1987)

53% (1985)

40% (1990)

54% (1980)

50% (1988)

55% (1988)

65% (1987)

37% (1989)

44% (1994)

46% (1986)

55% (1981)

51% (1986)

50% (1988)

39% (1982)

50% (1986)

45% (1987)

36% (1988)

52% (1988)

50% (1985)

52% (1986)