84% (2002)

68% (1995)

67% (1997)

59% (2003)

64% (1996)

72% (1995)

51% (2001)

54% (1993)

57% (1997)

30% (1996)

57% (1997)

59% (1976)

71% (1999)

70% (2003)

61% (1999)

50% (1997)

67% (1993)

43% (1992)

58% (2001)

54% (1995)