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This is a 4-digit numeric variable.


YEAR is a four-digit variable reporting the calendar year (e.g., 2003) the survey was conducted and the data were collected. YEAR indicates the survey year reported on the household record.


This variable is completely comparable before 2019.

The NHIS questionnaire was substantially redesigned in 2019 to introduce a different data collection structure and new content. For more information on changes in terminology, universes, and data collection methods beginning in 2019, please see the user note.


  • 1963-2018: All households.
  • 2019-2022: Sample adults age 18+ and sample children age 0-17.


  • 1963-2022


  • No weights are available for this variable. Please refer to YEAR for more information.