57% (2011)

61% (2011)

50% (2009)

60% (2010)

64% (2011)

64% (2007)

52% (2008)

63% (2009)

60% (2010)

47% (2011)

47% (2011)

0% (1976)

64% (2010)

60% (2009)

65% (2005)

60% (2006)

72% (2001)

0% (2008)

50% (2013)

63% (2003)