61% (2011)

57% (2011)

50% (2009)

52% (2008)

64% (2007)

60% (2010)

64% (2011)

64% (2010)

0% (1976)

47% (2011)

60% (2010)

47% (2011)

63% (2009)

60% (2009)

60% (2006)

65% (2005)

0% (2008)

63% (2003)

50% (2013)

72% (2001)