# BLS survey `li`

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

Survey documentation: `li.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 |
|---|---|---|
| li.area | 1 | area_code, area_name |
| li.contacts | 16 | Consumer Price Indexes Contacts |
| li.data.1.AllData | 12071 | series_id, year, period, value, footnote_codes |
| li.footnote | 0 | footnote_code, footnote_text |
| li.item | 27 | item_code, item_name |
| li.period | 13 | period, period_abbr, period_name |
| li.series | 27 | series_id, area_code, item_code, periodicity_code, base_period, footnote_codes, begin_year, begin_period, end_year, end_period |