71% (2002)

52% (1997)

60% (1986)

67% (2000)

78% (1993)

69% (1989)

65% (1991)

50% (1984)

59% (1990)

71% (1993)

58% (2004)

60% (1995)

50% (1990)

54% (1991)

50% (1990)

48% (1985)

63% (1992)

35% (1999)

73% (1996)

65% (1991)