| Code | Definition | Number of Accessions |
| 1 | very small number of branches <0,1 | 2 |
| 2 | number of branches 0,1-1,0 | 37 |
| 3 | small number of branches 1,1-2,0 | 93 |
| 4 | number of branches 2,1-3,0 | 41 |
| 5 | intermediate number of branches 3,1-4,0 | 23 |
| 6 | number of branches 4,1-5,0 | 15 |
| 7 | large number of branches 5,1-6,0 | 6 |
| 8 | number of branches 6,1-7,0 | 2 |
| 9 | very large number of branches >7,1-8,0 | 1 |