70% (1995)

60% (1997)

40% (1996)

73% (1999)

70% (1999)

64% (1995)

63% (1993)

61% (1999)

64% (1998)

63% (1996)

70% (1994)

60% (1993)

66% (1994)

63% (1998)

60% (1996)

73% (1995)

58% (1995)

71% (1994)

77% (1996)

70% (1998)