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The ratio of children under 5 to women 20 to 44 years of age is affected by three largely independent variables:
The ratios of children to women could only be translated into terms of birth rates if the mortality of children under 5 were the same in all groups and if the age distributions of the women in the basic group were also the same. These ratios can, however, be used for comparative purposes if we bear in mind their limitations. What these ratios really measure is the effective reproduction of the different groups.
Census statistics date back to 1790 and reflect the growth and change of the United States. Past census reports contain some terms that today’s readers may consider obsolete and inappropriate. As part of our goal to be open and transparent with the public, we are improving access to all Census Bureau original publications and statistics, which serve as a guide to the nation's history.
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