72% (2002)

78% (1993)

50% (1984)

66% (2000)

58% (2004)

69% (1989)

54% (1991)

60% (1986)

35% (1999)

59% (1990)

52% (1997)

71% (1993)

63% (1992)

57% (1987)

67% (1994)

60% (1989)

49% (1984)

70% (1990)

60% (1995)

50% (1990)