UH_OCCLYR_A4 is a 4-digit variable.
Codes are available here.
Occupation of job last year - 1971-1982
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
- Civilian adults who worked last year.
|1971 – 1982||-||-||X||-||-||-||-||-||-||-||-||-|