53% (1982)

68% (2003)

61% (1986)

0% (1956)

60% (1976)

0% (1986)

64% (1988)

58% (1986)

50% (1990)

50% (1958)

50% (1967)

65% (1966)

57% (1979)

55% (1986)

65% (1978)

57% (1989)

70% (1955)

52% (1970)

50% (1974)

60% (1963)