67% (2014)

69% (2017)

73% (2004)

57% (1997)

61% (1998)

62% (1996)

75% (1994)

68% (2016)

77% (2011)

76% (2013)

61% (2015)

62% (2018)

65% (1977)

65% (2018)

76% (2008)

64% (1987)

67% (1973)

42% (1989)

70% (1977)

76% (2018)