65% (1997)

61% (1998)

65% (1993)

71% (1995)

71% (1995)

45% (1999)

60% (1994)

62% (1995)

70% (1997)

57% (1997)

67% (1995)

59% (1996)

52% (1997)

57% (1994)

69% (1998)

53% (1998)

56% (1995)

55% (1994)

48% (1997)

58% (1996)