50% (1990)

64% (1987)

52% (1986)

60% (1968)

70% (1963)

51% (1976)

60% (1988)

43% (1975)

72% (1959)

71% (1977)

65% (1976)

63% (1967)

46% (1986)

53% (1961)

43% (1987)

73% (1961)

60% (1952)

0% (1985)

0% (1988)

51% (1967)