70% (1998)

61% (1998)

45% (1999)

64% (1993)

70% (1995)

65% (1997)

60% (1996)

66% (1995)

60% (1994)

55% (1995)

70% (1995)

63% (1995)

70% (1997)

55% (1995)

68% (1998)

61% (1995)

57% (1997)

57% (1994)

53% (1998)

49% (1997)