75% (1987)

60% (1927)

60% (1961)

30% (1964)

30% (1979)

70% (1978)

20% (1983)

65% (1992)

30% (1971)

80% (1956)

60% (1978)

50% (1990)

90% (1986)

60% (1981)

50% (1950)

50% (1939)

0% (1971)

65% (1953)

50% (1963)

60% (1971)