| Code | Definition | Number of Accessions |
| 1 | very low < 30,0 g (< 20,0 g) | 1 |
| 3 | low 31,1- 60,0 g ( 21,0- 50,0 g) | 7 |
| 4 | 61,1- 90,0 g ( 51,0- 70,0 g) | 4 |
| 5 | medium 91,0-120,0 g ( 71,0- 90,0 g) | 38 |
| 6 | 121,0-150,0 g ( 91,0-110,0 g) | 25 |
| 7 | high 151,0-180,0 g (111,0-130,0 g) | 48 |
| 9 | very high >180,0 g (>130,0 g) | 57 |