57% (1977)

47% (1985)

80% (1967)

60% (1982)

70% (1980)

80% (1973)

56% (1956)

50% (1964)

58% (1972)

0% (1967)

67% (1984)

63% (1973)

0% (1974)

70% (1978)

53% (1979)

64% (1982)

60% (1967)

55% (1970)

60% (1982)

0% (1994)