74% (1982)

61% (1988)

39% (1968)

62% (1990)

53% (1989)

75% (1982)

68% (1975)

74% (1963)

0% (1984)

65% (1967)

79% (1971)

51% (1956)

62% (1976)

61% (1978)

60% (1984)

60% (1977)

56% (1977)

54% (1973)

68% (1958)

67% (1971)