71% (1995)

61% (1998)

45% (1999)

64% (1993)

71% (1995)

65% (1997)

62% (1995)

67% (1995)

70% (1997)

60% (1994)

57% (1994)

69% (1998)

52% (1997)

56% (1995)

57% (1997)

59% (1996)

53% (1998)

55% (1996)

57% (1996)

63% (1995)