| Code | Definition | Number of Accessions |
| 1 | FINE | 11 |
| 2 | (1 = FINE, 9 = HARSH/COARSE) | 37 |
| 3 | (1 = FINE, 9 = HARSH/COARSE) | 117 |
| 4 | (1 = FINE, 9 = HARSH/COARSE) | 211 |
| 5 | MEDIUM | 320 |
| 6 | (1 = FINE, 9 = HARSH/COARSE) | 322 |
| 7 | (1 = FINE, 9 = HARSH/COARSE) | 214 |
| 8 | (1 = FINE, 9 = HARSH/COARSE) | 107 |
| 9 | HARSH/COARSE | 10 |