| Code | Definition | Number of Accessions |
| 1 | very low < 0,25 (kg.m2) | 2 |
| 2 | very low to low 0,25 - 0,40 (kg.m2) | 3 |
| 3 | low 0,41 - 0,55 (kg.m2) | 1 |
| 4 | low to medium 0,56 - 0,70 (kg.m2) | 2 |
| 5 | medium 0,71 - 0,85 (kg.m2) | 1 |
| 6 | medium to high 0,86 - 1,00 (kg.m2) | 4 |
| 7 | high 1,01 - 1,15 (kg.m2) | 2 |
| 9 | ery high > 1,30 (kg.m2) | 3 |