industry_code - Character. The NAICS industry code. Items starting with 10 are aggregated values, not corresponding to a unique 6-digit NAICS.
industry_title - Character. The descripion of the industry code provided by the BLS. This title also includes the code value for clarity.
ind_level - Character. A description of the level of aggregation. Values are "Total", "Cluster", or "Supersector" for the "10" code aggregations, or else the length of the NAICS code, from 2-6 digits.
naics_2d - Character. The first two digits of `industry_code`, which may be helpful to filter the results.
sector - Character. Similar to `naics_2d` except that when the industry sector spans multiple two digit codes, those codes are hyphenated (e.g. Manufacturing is NAICS 31, 32, and 33, so this displays '31-33').
vintage_start - Integer. The earliest year reviewed for NAICS code use. NAICS will change every 5 years, so data from before this year will have some missing values.
vintage_end - Integer. The last year that a particular code is used, if applicable. Set to 3000 for current codes.