1992 CENSUS OF RETAIL TRADE Abbreviations and Symbols The following abbreviations and symbols are used in this publication: D Withheld to avoid disclosing data for individual companies; data are included in broader kind-of-business totals. N Not available. R Revised. X Not applicable. Y Withheld due to insufficient coverage of merchandise lines or to avoid disclosing data for individual companies. Some data are shown at a lower kind-of- business level. Z Less than 0.05 percent.