67% (1995)

70% (1998)

62% (1996)

59% (1995)

59% (1997)

60% (1999)

40% (1994)

73% (1999)

60% (1998)

60% (1996)

56% (1995)

65% (1995)

57% (1996)

52% (1999)

61% (1999)

66% (1995)

58% (1997)

61% (1998)

65% (1995)

61% (1997)