February 2026 monthly data are now available. IPUMS CPS has not yet processed the re-released January 2026 data. October 2025 data were not collected during the U.S. federal government shutdown.
Codes and Frequencies
Description
Class of worker, longest job last year - 1976-2025
Unicon Corporation made the following notes about this variable:
* user must restrict sample to intended universe to differentiate between NIU=0 values and valid=0 values.
Universe
- 1976-1987: Civilian adults who worked last year.
- 1988-1989: Those who worked anytime during the last year even if temporary, part-ime, seasonal, or in the Armed Forces.
- 1990-2025: Those who worked anytime during the last year.
Availability
| Years | Jan | Feb | ASEC | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 – 2025 | - | - | X | - | - | - | - | - | - | - | - | - |
