| Code | Definition | Number of Accessions |
| 1 | very low | 1 |
| 2 | (1= very low, 9= very high) | 1 |
| 3 | (1= very low, 9= very high) | 20 |
| 4 | (1= very low, 9= very high) | 101 |
| 5 | (1= very low, 9= very high) | 197 |
| 6 | (1= very low, 9= very high) | 171 |
| 7 | (1= very low, 9= very high) | 99 |
| 8 | (1= very low, 9= very high) | 28 |
| 9 | very high | 7 |