# BLS survey `ch`

Source: U.S. Bureau of Labor Statistics, LABSTAT time-series database (https://download.bls.gov/pub/time.series/ch/). Public domain U.S. government data. Credit: U.S. Bureau of Labor Statistics.

Survey documentation: `ch.txt`.

`*_series.parquet` defines each series_id (labels); `*_data_*.parquet` holds series_id, year, period (M01-M12 monthly, Q0x quarterly, A01/M13 annual), value, footnote_codes; other files map codes to labels.

| file | rows | columns |
|---|---|---|
| ch.age | 91 | age_code, age_text |
| ch.case | 14 | case_code, case_text |
| ch.category | 2139 | case_code, category_code, category_text |
| ch.contacts | 58 | Safety, Health, and Working Conditions Contacts |
| ch.data.1.AllData | 66161839 | series_id, year, period, value, footnote_codes |
| ch.datatype | 3 | datatype_code, datatype_text |
| ch.event | 259 | event_code, event_text, display_level, selectable, sort_sequence |
| ch.footnote | 2 | footnote_code, footnote_text |
| ch.gender | 4 | gender_code, gender_text |
| ch.hour | 12 | hour_code, hour_text |
| ch.industry | 1348 | industry_code, industry_text, display_level, selectable, sort_sequence |
| ch.los | 6 | los_code, los_text |
| ch.nature | 410 | nature_code, nature_text, display_level, selectable, sort_sequence |
| ch.occupation | 1289 | occupation_code, occupation_text, display_level, selectable, sort_sequence |
| ch.ownership | 5 | ownership_code, ownership_name |
| ch.pob | 157 | pob_code, pob_text, display_level, selectable, sort_sequence |
| ch.race | 10 | race_code, race_text |
| ch.series | 20224744 | series_id, category_code, datatype_code, case_code, age_code, los_code, race_code, gender_code, pob_code, event_code, source_code, occupation_code, nature_code, industry_code, time_code, hour_code, weekday_code, special_code, ownership_code, state_code, footnote_codes, begin_year, begin_period, end_year, end_period |
| ch.source | 1252 | source_code, source_text, display_level, selectable, sort_sequence |
| ch.special | 2 | special_code, special_text |
| ch.state | 47 | state_code, state_name, display_level, selectable, sort_sequence |
| ch.time | 8 | time_code, time_text |
| ch.weekday | 8 | weekday_code, weekday_text |