| Code | Definition | Number of Accessions |
| 1 | PROTRUDED | 639 |
| 2 | (1 = PROTRUDED, 9 = INSERTED) | 50 |
| 3 | (1 = PROTRUDED, 9 = INSERTED) | 535 |
| 4 | (1 = PROTRUDED, 9 = INSERTED) | 71 |
| 5 | FLAT | 513 |
| 6 | (1 = PROTRUDED, 9 = INSERTED) | 7 |
| 7 | (1 = PROTRUDED, 9 = INSERTED) | 70 |
| 8 | (1 = PROTRUDED, 9 = INSERTED) | 5 |
| 9 | INSERTED | 55 |
| M | MIXED | 542 |