52% (1993)

58% (1991)

37% (1993)

59% (1994)

46% (1995)

42% (1995)

54% (1994)

49% (1992)

47% (1993)

53% (1995)

42% (1993)

58% (1992)

45% (1992)

45% (1991)

39% (1990)

38% (1989)

45% (1993)

36% (1990)

48% (1992)

40% (1995)