48% (1980)

58% (1985)

59% (1964)

50% (1968)

68% (1968)

0% (1972)

70% (1975)

50% (1978)

56% (1960)

60% (1975)

60% (1981)

50% (1953)

50% (1955)

50% (1949)

81% (1972)

27% (1971)

0% (1994)

55% (1970)

0% (1970)

0% (1976)