76% (1963)

75% (1964)

10% (1966)

62% (1976)

45% (1987)

55% (1972)

70% (1966)

70% (1976)

63% (1975)

66% (1976)

46% (1986)

60% (1981)

0% (1984)

76% (1967)

57% (1970)

90% (1957)

63% (1969)

50% (1965)

0% (1987)

40% (1976)