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4-digits agriculture sample assigned AT&T benchmark employment benchmark factor blank BLS-Washington bypass code check digit Code Numeric column contact the respondent correct delete division code duplicate Edit Criteria entered error establishments estimating cell field Final OSH FIPS county codes FIPS State Code Hours identify incidence rate included industry level injuries and illnesses keypunched listed LWDC mailing manual editing master record match Multi-establishment number of schedules Numeric 4 pos Numeric/Blank occupational illnesses occupational injuries Occupational Safety original SIC OSH data OSH Survey OSHA ownership code precoded employment prenotification primary company name procedures recordkeeping refinement relative errors report location reported data reported employment response rate reweighting Safety and Health sample code sample units schedule number selected SIC changes SIC code SIC's source code Special Adds status code tape TOT-LWC total all industries transmittal U.I. account numbers U.I. sample U.S. Postal Service updated usable valid weight