52% (1987)

39% (1994)

48% (1987)

58% (1990)

45% (1985)

48% (1987)

46% (1992)

59% (1986)

47% (1986)

44% (1989)

32% (1986)

43% (1990)

51% (1988)

37% (1991)

53% (1988)

44% (1995)

45% (1985)

49% (1990)

41% (1991)

44% (1986)