When errors are discovered, the Census Bureau reports the issue, corrects the error, and re-releases the file. In addition to errata notes, there may be user notes to give caution, discuss weighting and estimation, explain variables, and so on.
Learn more about errors and corrections related to the Economic Census, see the list below of each reissued file with the date of reissue and a brief description. All revisions are available on data.census.gov.
After analysis and processing, data values are occasionally revised and updated.
Note: Revisions are only applied when data in a particular table are reissued due to the identification of an error. Preliminary data that are released in one table and then released later in another table do not get an '(r)' flag, even if they have changed.