58% (1970)

62% (1974)

53% (1969)

53% (1969)

49% (1970)

63% (1965)

28% (2001)

37% (1969)

45% (1968)

58% (1966)

52% (1970)

50% (2003)

54% (1972)

49% (2001)

42% (1979)

60% (1956)

45% (1964)

50% (1964)

46% (2001)

55% (2004)