75% (1977)

78% (1976)

64% (2023)

63% (1993)

62% (1990)

58% (1988)

66% (1981)

57% (1994)

61% (1994)

68% (2004)

71% (2015)

71% (1964)

63% (2002)

55% (1995)

62% (2018)

63% (2002)

61% (1998)

56% (1991)

63% (1989)

62% (1999)