32% (1983)

65% (1968)

30% (1975)

50% (1982)

60% (1958)

50% (1987)

57% (1954)

60% (1970)

50% (1960)

90% (1957)

55% (1974)

0% (1991)

70% (1987)

62% (1975)

80% (1986)

45% (1990)

70% (1984)

60% (1976)

72% (1978)

0% (1979)