58% (1998)

67% (1986)

60% (1985)

69% (1998)

67% (1990)

73% (1987)

69% (1990)

65% (1984)

63% (1985)

69% (1987)

63% (1994)

49% (1987)

65% (1987)

60% (1987)

66% (1987)

54% (1985)

46% (1994)

57% (1988)

53% (1988)

67% (1992)