47% (1967)

58% (1991)

55% (1957)

60% (1971)

80% (1980)

53% (1983)

60% (1986)

0% (1961)

0% (1978)

40% (1977)

52% (1958)

60% (1981)

55% (1982)

63% (1979)

0% (1986)

40% (1971)

67% (1969)

0% (1959)

45% (1991)

77% (1982)