61% (1981)

65% (1978)

63% (1979)

72% (2015)

54% (1983)

64% (1973)

72% (1971)

75% (1970)

56% (1968)

70% (1973)

50% (1966)

0% (1964)

59% (1972)

40% (1972)

0% (1969)

75% (1964)