60% (1976)

73% (1986)

48% (1986)

0% (1960)

49% (1981)

0% (1979)

50% (1964)

65% (1960)

0% (1977)

35% (1974)

40% (1957)

60% (1958)

60% (1989)

40% (1981)

70% (1960)

75% (1979)

35% (1985)

65% (1966)

60% (1978)

43% (1972)