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19470131      -0.032359
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19470731       0.008333
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19470930       0.137931
19471031      -0.015152
19471129      -0.023077
19471231       0.111111
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19480228      -0.065041
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19490131       0.035250
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19491031       0.047619
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19551031      -0.036232
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19551230       0.046729
19560131      -0.053571
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19561031       0.019763
19561130       0.003876
19561231       0.040698
19570131      -0.076350
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19571129       0.097735
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19681031       0.049637
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19690228      -0.035057
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