84% (2002)

73% (2000)

70% (1996)

67% (1997)

70% (1999)

52% (2001)

71% (1999)

64% (2004)

49% (2003)

43% (1993)

58% (1999)

40% (1993)

68% (2003)

68% (2004)

48% (2005)

56% (1997)

66% (2005)

61% (1999)

71% (1995)

42% (1999)