65% (1987)

85% (1985)

59% (1981)

50% (1987)

42% (1960)

10% (1978)

60% (1960)

60% (1969)

42% (1980)

56% (1970)

62% (1985)

70% (1978)

0% (1975)

30% (1985)

0% (1983)

50% (1985)

60% (1978)

50% (1960)

50% (1962)

50% (1991)