| Code | Definition | Number of Accessions |
| 2 | very low to low 5 - 6,9 (mm) | 1 |
| 3 | low 7 - 8,9 (mm) | 21 |
| 4 | low to intermediate 9 - 10,9 (mm) | 23 |
| 5 | intermediate 11 - 12,9 (mm) | 7 |
| 6 | intermediate to high 13 - 14,9 (mm) | 5 |
| 8 | high to very high 17 - 19 (mm) | 1 |
| 9 | very high >19 (mm) | 3 |