57% (1969)

63% (1967)

61% (1974)

55% (1966)

77% (1970)

57% (1953)

61% (1981)

67% (1966)

58% (1962)

77% (1992)

0% (1990)

62% (1968)

64% (1964)

58% (1989)

71% (1997)

58% (1965)

64% (1966)

48% (1967)

67% (1987)

66% (1987)