| Code | Definition | Number of Accessions |
| 1 | very low < 6,0 (%) | 1 |
| 2 | very low to low 6,0 - 7,5 (%) | 4 |
| 3 | low 7,6 - 9,0 (%) | 5 |
| 4 | low to medium 9,1 - 10,5 (%) | 3 |
| 5 | medium 10,6 - 12,0 (%) | 4 |
| 6 | medium to high 12,1 - 13,5 (%) | 4 |
| 7 | high 13,6 - 15,0 (%) | 7 |
| 8 | high to very high 15,1 - 16,5 (%) | 5 |