63% (1971)

67% (2011)

65% (1981)

63% (1973)

75% (1965)

47% (1975)

71% (2006)

58% (1968)

60% (2016)

46% (1988)

70% (1981)

75% (1966)

68% (1960)

55% (1970)

50% (1974)

56% (1968)

59% (1967)

70% (1996)

59% (1958)

0% (1955)