64% (1975)

70% (1991)

52% (1985)

42% (1982)

58% (1953)

0% (1966)

63% (1968)

32% (1983)

48% (1970)

64% (1977)

59% (1972)

58% (1987)

0% (1973)

32% (1988)

44% (1979)

0% (1987)

59% (1955)

30% (1990)

61% (1985)

30% (1989)