59% (1989)

69% (1992)

69% (1998)

50% (1993)

60% (1990)

74% (1993)

59% (1994)

75% (1986)

67% (1990)

65% (2000)

74% (1994)

63% (1992)

49% (1991)

67% (1995)

64% (1992)

73% (1999)

73% (1999)

67% (1987)

67% (1995)

65% (1995)