| Value | Category | 
|---|---|
| 1 | HQs with no production/no sales at this location | 
| 2 | HQs with production and/or sales at this location | 
| 3 | Establishment physically separated from HQ and other establishments of the same firm | 
| 4 | Establishment physically separated from HQ but with other establishments of the same firm | 
| Sysmiss |