0% (2000)

77% (1997)

50% (2005)

64% (1970)

58% (2008)

76% (1999)

28% (2009)

30% (1970)

30% (2005)

51% (1999)

75% (1999)

71% (2000)

55% (2008)

68% (2003)

50% (2000)

72% (2003)

78% (2001)

80% (2003)

35% (1997)

60% (2007)