58% (1957)

48% (1974)

50% (1982)

57% (1974)

56% (1964)

58% (1991)

51% (1974)

65% (1977)

63% (1987)

60% (1986)

50% (1939)

58% (1956)

48% (1991)

47% (1990)

47% (1986)

0% (1986)

70% (1961)

58% (1990)

47% (1978)

51% (1990)