71% (2013)

49% (2014)

59% (2007)

71% (2008)

54% (2014)

78% (2008)

50% (2012)

56% (1980)

56% (2008)

76% (2008)

46% (2012)

56% (2011)

0% (2001)

53% (1997)

30% (2009)

43% (2003)

64% (2002)

52% (2006)

53% (2004)

56% (1999)