| Code | Definition | Number of Accessions |
| 1 | 0 egg mass production | 7 |
| 2 | 1% to 3% egg mass production | 45 |
| 3 | 4% to 12% egg mass production | 69 |
| 4 | 13% to 25% egg mass production | 47 |
| 5 | 26% to 38% egg mass production | 48 |
| 6 | 39% to 50% egg mass production | 15 |
| 7 | 51% to 65% egg mass production | 8 |
| 8 | 66% to 80% egg mass production | 11 |
| 9 | 81% to 100% egg mass production | 7 |