58% (2007)

69% (2003)

68% (1978)

57% (1987)

51% (2013)

70% (1971)

62% (2013)

55% (2008)

78% (2014)

59% (2018)

74% (1978)

68% (2002)

66% (1999)

60% (2009)

71% (1968)

59% (2011)

60% (1997)

65% (2015)

62% (2008)

61% (2018)