50% (1949)

43% (1973)

0% (1981)

52% (2006)

20% (1990)

50% (1965)

60% (1961)

65% (1984)

60% (1961)

50% (1968)

59% (1968)

0% (1995)

57% (1985)

63% (1966)

50% (1993)

58% (1979)

0% (1982)

50% (1968)

63% (1969)

40% (2007)