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Errors in Data for the Vietnamese Population: 2008 ACS, 2006-2008 ACS and Prior Years Going Back to the 2000 ACS

An error was discovered in the processing of the ACS that has produced an overestimate of the Vietnamese population in the United States in the ACS from 2000-2008. Answers of "don't know" or "refused" to the race question were incorrectly recorded as Vietnamese for a small number of people collected via mail questionnaires. We estimate that the national totals for the Vietnamese population are overestimated by approximately 170,000 people (about 10 percent of the Vietnamese population) in the 2008 ACS tables, and by a similar amount in the 2000-2007 ACS tables. We will produce tables of the Vietnamese population from the corrected 2008 ACS data and update this errata notice with the link to the tables when they are available. Corrected 2008 data will appear in the 2009 ACS 1-year Comparison Profiles. Corrected 2008 data will also be used to produce the 2005-2009 ACS 5-year and 2007-2009 ACS 3-year data products as well as future multiyear products. We do not plan to rerelease any of the existing ACS 1-year or 3-year tables on American FactFinder, or any of the ACS PUMS files.

Page Last Revised - October 20, 2021
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