53% (1988)

36% (1991)

57% (1990)

51% (1987)

57% (1990)

58% (1986)

49% (1987)

49% (1986)

40% (1994)

52% (1988)

50% (1990)

46% (1985)

43% (1989)

32% (2000)

30% (1989)

47% (1993)

25% (1997)

39% (1990)

34% (1986)

43% (1985)