67% (1979)

32% (1969)

67% (1963)

51% (1979)

49% (1977)

63% (1974)

67% (1973)

60% (1979)

56% (1974)

66% (1973)

51% (1980)

56% (1977)

67% (1963)

62% (1970)

57% (1964)

45% (1994)

65% (1963)

63% (1979)

57% (1971)

43% (1978)