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Codes and Frequencies

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For all persons, HISPFLAG reports if the respondent provided information about her/his Hispanic origin, or if this information was imputed. Imputations are classified according to the raw data from when the respondent was asked if she/he was of Hispanic origin. Beginning in 2017, NHIS has suppressed imputation flag variables indicating whether an ethnicity or race response was imputed; these variables are no longer available on public use files.


Not all raw data responses were available in all years; prior to 2000 unknown responses are not available and Hispanic origin imputed from a reference person is only available prior to 2000.


  • 1992-1996; 2000-2016: All persons.


  • 1992-1996, 2000-2016