72% (1993)

73% (1991)

74% (1990)

45% (1999)

73% (1989)

67% (1983)

65% (1995)

67% (1986)

65% (1995)

72% (1987)

73% (1989)

68% (1991)

59% (1996)

54% (1985)

54% (1985)

58% (2002)

45% (1986)

62% (1993)

59% (1993)

57% (1984)