| Code | Definition | Number of Accessions |
| 1 | very early < 60 (days) | |
| 2 | very early to early 60 - 72 (days) | |
| 3 | early 73 - 84 (days) | |
| 4 | early to medium 85 - 96 (days) | 1 |
| 5 | medium 97 - 108 (days) | 31 |
| 6 | medium to late 109 - 120 (days) | 1 |
| 7 | late 121 - 132 (days) | |
| 8 | late to very late 133 - 144 (days) | |
| 9 | very late > 144 (days) | |