64% (1980)

63% (1990)

64% (1995)

70% (1996)

54% (2009)

68% (1979)

58% (1996)

73% (2019)

59% (1991)

72% (1979)

77% (1953)

69% (1981)

54% (1995)

57% (1984)

62% (1989)

60% (1956)

56% (1994)

52% (2000)

62% (1985)

64% (1961)