68% (1970)

58% (1977)

0% (1982)

63% (1984)

50% (1990)

62% (1967)

50% (1995)

50% (1980)

68% (1971)

73% (1988)

64% (1977)

57% (1948)

53% (1963)

50% (1975)

0% (1990)

0% (1992)

58% (1986)

52% (1962)

56% (2002)

50% (1994)