70% (2003)

70% (1986)

77% (1987)

77% (1987)

70% (1985)

62% (1986)

48% (1997)

48% (1993)

72% (1995)

70% (1990)

76% (1993)

50% (1992)

57% (1994)

61% (2000)

71% (2001)

73% (1993)

67% (1989)

74% (1994)

70% (1990)

52% (1980)