50% (2000)

30% (2005)

77% (1997)

0% (2000)

50% (2005)

76% (1999)

74% (2003)

51% (1999)

70% (2000)

35% (1997)

28% (2009)

78% (2001)

64% (1970)

55% (2008)

72% (2003)

60% (2007)

30% (1970)

80% (2003)

40% (1970)

72% (2008)