60% (1970)

82% (1962)

58% (1980)

45% (1971)

60% (1970)

80% (1991)

80% (1957)

50% (1990)

45% (1983)

43% (1990)

10% (1969)

80% (1964)

38% (1986)

47% (1989)

60% (1967)

60% (1986)

67% (1988)

60% (1978)

50% (1989)

75% (1984)