40% (1996)

48% (1997)

64% (1995)

66% (1994)

73% (1999)

61% (1997)

72% (1995)

60% (1997)

63% (1998)

42% (1996)

65% (1992)

64% (1998)

82% (1998)

63% (1998)

59% (1998)

73% (1998)

63% (1996)

70% (1990)

71% (1994)

61% (1997)