| Code | Definition | Number of Accessions |
| 1 | ABUNDANT | 1056 |
| 2 | (1 = ABUNDANT, 9 = SPARSE) | 97 |
| 3 | (1 = ABUNDANT, 9 = SPARSE) | 178 |
| 4 | (1 = ABUNDANT, 9 = SPARSE) | 41 |
| 5 | MEDIUM | 516 |
| 6 | (1 = ABUNDANT, 9 = SPARSE) | 28 |
| 7 | (1 = ABUNDANT, 9 = SPARSE) | 32 |
| 8 | (1 = ABUNDANT, 9 = SPARSE) | 16 |
| 9 | SPARSE | 109 |