62% (2015)

60% (2011)

71% (2012)

70% (2015)

64% (2007)

63% (2012)

54% (1981)

75% (2006)

0% (2015)

80% (2009)

80% (2004)

75% (1997)

52% (2005)

60% (2007)

58% (2013)

63% (2003)

0% (2009)

59% (2012)

74% (2003)

70% (2012)