20% (1947)

33% (1971)

42% (1991)

50% (1972)

0% (1986)

60% (1970)

0% (1961)

50% (1939)

50% (1990)

0% (1975)

0% (1982)

67% (1971)

46% (1958)

49% (1972)

56% (1986)

60% (1980)

40% (1963)

28% (1982)

0% (1982)

0% (1989)