74% (1964)

77% (1967)

70% (1972)

55% (1975)

63% (1985)

62% (2019)

69% (1968)

59% (1972)

61% (2017)

48% (1981)

60% (1970)

65% (1966)

72% (1989)

49% (1982)

71% (1993)

55% (1967)

67% (1969)

50% (1968)

46% (1980)

55% (1961)