40% (1996)

70% (1999)

60% (1999)

64% (1998)

56% (2000)

50% (2001)

50% (1999)

61% (2000)

61% (1998)

48% (1999)

56% (1996)

60% (2001)

70% (1996)

48% (2000)

58% (1997)

52% (1998)

66% (2000)

73% (1996)

60% (1994)

50% (1998)