| Value | Category |
|---|---|
| -9 | Don't know (spontaneous) |
| 1 | Shareholding company with shares trade in the stock market |
| 2 | Shareholding company with non-traded shares or shares traded privately |
| 3 | Sole proprietorship |
| 4 | Partnership |
| 5 | Limited partnership |
| 6 | Other |
| Sysmiss |