| Code | Definition | Number of Accessions |
| 1 | WEAKEST | 20 |
| 2 | (1 = WEAKEST, 9 = STRONGEST) | 111 |
| 3 | (1 = WEAKEST, 9 = STRONGEST) | 321 |
| 4 | (1 = WEAKEST, 9 = STRONGEST) | 350 |
| 5 | (1 = WEAKEST, 9 = STRONGEST) | 344 |
| 6 | (1 = WEAKEST, 9 = STRONGEST) | 319 |
| 7 | (1 = WEAKEST, 9 = STRONGEST) | 395 |
| 8 | (1 = WEAKEST, 9 = STRONGEST) | 148 |
| 9 | STRONGEST | 38 |