61% (2015)

60% (2011)

63% (2007)

68% (2015)

63% (2012)

70% (2012)

60% (2003)

74% (2003)

65% (2015)

58% (2013)

20% (2015)

54% (1981)

60% (2008)

80% (2009)

78% (2011)

52% (2011)

52% (2005)

0% (1999)

90% (2004)

44% (1990)