70% (1998)

61% (1998)

60% (1994)

66% (1995)

45% (1999)

64% (1993)

65% (1997)

70% (1995)

70% (1995)

60% (1996)

55% (1995)

55% (1995)

68% (1998)

57% (1997)

61% (1995)

70% (1997)

58% (1996)

63% (1995)

52% (1997)

49% (1997)