72% (1998)

66% (1998)

66% (1997)

73% (1995)

55% (2000)

55% (1997)

44% (1999)

50% (1993)

54% (1998)

61% (1994)

47% (1997)

52% (1997)

48% (1995)

52% (1995)

55% (1996)

67% (1996)

70% (2001)

30% (1992)

44% (1998)

46% (1996)