72% (1998)

73% (1995)

55% (2000)

66% (1998)

65% (1997)

80% (1995)

55% (1999)

43% (1999)

50% (1993)

64% (1997)

46% (1996)

71% (1996)

60% (1990)

60% (1994)

57% (1989)

53% (1998)

51% (1997)

49% (1997)

55% (1997)

67% (1996)