77% (1997)

50% (2000)

50% (2005)

30% (2005)

0% (2000)

55% (2008)

51% (1999)

55% (1998)

35% (1997)

64% (1969)

74% (2003)

28% (2009)

78% (2001)

72% (2003)

70% (2000)

80% (2003)

40% (1969)

0% (2003)

60% (2007)

30% (1969)