81% (1984)

78% (1987)

64% (2002)

73% (2013)

76% (1999)

73% (2018)

59% (2000)

68% (1991)

72% (1977)

65% (2000)

55% (2017)

55% (2015)

63% (1995)

62% (2005)

74% (1995)

69% (1993)

63% (2000)

70% (1985)

65% (1982)

72% (1994)