| Code Figure | Meaning |
|---|---|
| 0 |
Worst |
| 1 |
Very poor |
| 2 |
Poor |
| 3 |
Average |
| 4 |
Good |
| 5 |
Excellent |
| 6-190 |
Reserved |
| 191 |
Unknown |
| 192-254 |
Reserved for Local Use |
| 255 | Missing |