53% (1969)

56% (1972)

63% (1965)

49% (1970)

62% (1974)

43% (1968)

58% (1970)

51% (1970)

53% (2003)

36% (1969)

58% (1966)

53% (1969)

40% (2001)

49% (2001)

42% (1979)

45% (1968)

46% (1964)

0% (1957)

53% (1964)

28% (2001)