| Code Figure | Meaning |
|---|---|
| 0 |
No |
| 1 |
Yes |
| 2-3 |
Reserved |
| 4 |
Low |
| 5 |
Reserved |
| 6 |
Medium |
| 7 |
Reserved |
| 8 |
High |
| 9-191 |
Reserved |
| 192-254 |
Reserved for Local Use |
| 255 |
Missing |