65% (1961)

61% (1980)

65% (1986)

62% (1978)

62% (1990)

53% (1997)

47% (1961)

62% (1965)

56% (1964)

50% (1969)

55% (1972)

61% (2023)

52% (1965)

60% (1957)

61% (1965)

58% (1967)

62% (1980)

51% (1969)

64% (1959)

68% (1967)