77% (1997)

70% (2000)

55% (2008)

75% (1999)

50% (2000)

50% (2005)

51% (1999)

72% (2003)

55% (1998)

30% (2005)

74% (2003)

68% (2005)

35% (1997)

0% (2000)

28% (2009)

80% (2003)

76% (1999)

0% (2003)

69% (2008)

64% (1970)