63% (1971)

75% (1965)

63% (1973)

65% (1981)

67% (2011)

47% (1975)

70% (1996)

58% (1968)

56% (1968)

50% (1974)

53% (1969)

75% (1966)

59% (1967)

46% (1988)

70% (1981)

55% (1970)

41% (1979)

68% (1960)

59% (1958)

60% (2016)