71% (1995)

61% (1998)

65% (1997)

71% (1995)

65% (1993)

45% (1999)

67% (1995)

60% (1994)

62% (1995)

55% (1994)

57% (1997)

59% (1996)

52% (1997)

70% (1997)

68% (1998)

62% (1997)

57% (1996)

57% (1994)

55% (1995)

53% (1998)