79% (2000)

73% (2007)

65% (2007)

73% (2019)

55% (2018)

77% (2014)

63% (1977)

74% (1999)

73% (2003)

64% (2019)

62% (1992)

72% (1994)

68% (1992)

71% (1988)

78% (2016)

70% (2015)

71% (2013)

72% (1983)

64% (2005)

72% (1991)