25% (2006)

52% (2004)

56% (2001)

52% (2005)

61% (2000)

70% (1999)

70% (2001)

52% (2006)

65% (2004)

60% (2000)

78% (1994)

0% (2005)

48% (2006)

67% (2000)

0% (1995)

73% (1998)

61% (1996)

47% (2001)

0% (1999)

70% (1995)