78% (1994)

55% (1993)

52% (1998)

65% (1997)

82% (1992)

78% (1998)

78% (1999)

90% (1970)

70% (1994)

90% (1998)

0% (1990)

76% (1995)

70% (1996)

77% (1996)

71% (1985)

58% (1997)

65% (1999)

60% (1992)

100% (1997)

70% (1998)