50% (1955)

60% (1970)

20% (1980)

70% (1967)

58% (1936)

50% (1964)

57% (1975)

0% (1977)

0% (1967)

80% (1986)

0% (1969)

0% (1990)

50% (1960)

50% (1983)

50% (1990)

40% (1965)

73% (1969)

70% (1982)

70% (1965)

0% (1981)