63% (1961)

30% (1976)

55% (1957)

46% (1988)

0% (1996)

57% (1966)

65% (1984)

0% (1959)

70% (1955)

60% (1958)

50% (1986)

54% (2004)

70% (1977)

60% (1984)

0% (1983)

50% (1970)

72% (1982)

68% (1956)

58% (1979)

70% (1967)