| Code | Definition | Number of Accessions |
| 1 | UNIFORM | 23 |
| 2 | (1 = UNIFORM, 9 = VARIABLE) | 60 |
| 3 | (1 = UNIFORM, 9 = VARIABLE) | 47 |
| 4 | (1 = UNIFORM, 9 = VARIABLE) | 46 |
| 5 | (1 = UNIFORM, 9 = VARIABLE) | 34 |
| 6 | (1 = UNIFORM, 9 = VARIABLE) | 26 |
| 7 | (1 = UNIFORM, 9 = VARIABLE) | 21 |
| 8 | (1 = UNIFORM, 9 = VARIABLE) | 19 |
| 9 | VARIABLE | 8 |