| Code | Definition | Number of Accessions |
| 1 | UNSYMMETRICAL | 9 |
| 2 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 9 |
| 3 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 57 |
| 4 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 58 |
| 5 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 139 |
| 6 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 157 |
| 7 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 187 |
| 8 | (1 = UNSYMMETRICAL, 9 = MOST SYMMETRICAL) | 68 |
| 9 | MOST SYMMETRICAL | 22 |