| Code | Definition | Number of Accessions |
| 1 | very early < 26 (days) | 9 |
| 2 | very early to early 26 - 32 (days) | 8 |
| 3 | early 33 - 39 (days) | 21 |
| 4 | early to medium 40 - 46 (days) | 83 |
| 5 | medium 47 - 53 (days) | 46 |
| 6 | medium to late 54 - 60 (days) | 17 |
| 7 | late 61 - 67 (days) | 2 |
| 8 | late to very late 68 - 74 (days) | |
| 9 | very late > 74 (days) | |