71% (1998)

67% (1998)

73% (1995)

65% (1997)

50% (1993)

61% (1994)

55% (2000)

47% (1997)

52% (1997)

44% (1999)

54% (1998)

55% (1999)

48% (1995)

70% (2001)

58% (1996)

71% (1996)

57% (1989)

67% (1996)

52% (1991)

64% (1997)