77% (1997)

64% (1970)

52% (1999)

75% (1999)

30% (2005)

50% (2000)

68% (2003)

50% (2005)

0% (2000)

76% (1999)

68% (2005)

0% (2003)

55% (2008)

78% (2001)

28% (2009)

72% (1970)

30% (1970)

62% (2008)

60% (2007)

80% (2003)