| Code | Definition | Number of Accessions |
| 1 | very low < 10,0 | 3 |
| 2 | very low to low 10,1 – 12,0 | 4 |
| 3 | low 12,1 – 14,0 | 5 |
| 4 | low to medium 14,1 – 16,0 | 7 |
| 5 | medium 16,1 – 18,0 | 8 |
| 6 | medium to high 18,1 – 20,0 | 9 |
| 7 | high 20,1 – 22,0 | 10 |
| 8 | high to very high 22,1 – 24,0 | 3 |
| 9 | very high > 24,1 | 1 |