0% (1960)

64% (1974)

65% (1975)

70% (1998)

0% (1969)

73% (2007)

50% (1988)

40% (1977)

80% (1969)

58% (1961)

50% (1970)

73% (1968)

76% (1978)

70% (1948)

66% (1994)

50% (1953)

55% (1956)

0% (1961)

65% (1979)

60% (2008)