62% (1988)

55% (1980)

62% (1978)

50% (1978)

56% (1962)

44% (1987)

65% (1989)

45% (1981)

80% (1955)

52% (1986)

0% (1977)

63% (1973)

62% (1976)

82% (1958)

53% (1975)

0% (1967)

60% (1964)

36% (1989)

73% (1968)

73% (1964)