66% (2016)

77% (2016)

78% (2017)

71% (2005)

76% (2014)

68% (2006)

60% (2009)

60% (2006)

69% (1999)

67% (1998)

64% (2006)

57% (2008)

75% (2008)

57% (2003)

64% (2013)

59% (2001)

63% (2009)

0% (1970)

74% (2011)

70% (2000)