67% (1973)

76% (2008)

76% (2018)

61% (1981)

70% (2017)

61% (2015)

68% (1977)

62% (1996)

72% (2004)

77% (2018)

68% (2016)

75% (1994)

61% (2018)

76% (2011)

60% (1978)

62% (1998)

61% (1977)

53% (2013)

59% (2018)

42% (1976)