50% (2011)

50% (2006)

72% (2002)

20% (2015)

55% (1996)

71% (2002)

88% (2014)

66% (2003)

66% (2011)

84% (2009)

69% (2009)

42% (2005)

0% (1970)

80% (1998)

100% (1997)

60% (1996)

75% (2002)