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### Census Instructions

### Also in this Section:

                          - 2010 Instructions
                          - 2000 Instructions
                          - 1990 Instructions
                          - 1980 Instructions
                          - 1950 Instructions
                          - 1940 Instructions
                          - 1930 Instructions
                          - 1920 Instructions
                          - 1910 Instructions
                          - 1900 Instructions
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                          - 1870 Instructions
                          - 1860 Instructions
                          - 1850 Instructions
                          - 1790 Instructions

## 2010 Instructions

Approximately 134 million households participated in the 2010 census by mail.  Enumerators conducted door-to-door interviews only for households that could not be reached by the U.S. Postal Service or did not return their mailed questionnaire.  The instructions provided here were used by enumerators who visited households that did not return their mailed questionnaire during the 2010 census' "Nonresponse Follow-Up" (NRFU) operation.

**2010 Nonresponse Follow-Up Instructions**

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Measuring America's People, Places, and Economy

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