70% (1967)

58% (1960)

0% (1989)

53% (1955)

56% (1973)

62% (1972)

60% (1955)

0% (1979)

0% (1985)

69% (1975)

64% (1976)

45% (1997)

0% (1960)

45% (1966)

62% (1958)

56% (1976)

60% (1953)

50% (1972)

70% (1958)

57% (1983)