| Code | Definition | Number of Accessions |
| 1 | EARLY SEASON | 236 |
| 2 | (1 = EARLY SEASON, 9 = LATE SEASON) | 10 |
| 3 | (1 = EARLY SEASON, 9 = LATE SEASON) | 23 |
| 4 | (1 = EARLY SEASON, 9 = LATE SEASON) | 2 |
| 5 | MIDSEASON | 638 |
| 6 | (1 = EARLY SEASON, 9 = LATE SEASON) | 18 |
| 7 | (1 = EARLY SEASON, 9 = LATE SEASON) | 111 |
| 8 | (1 = EARLY SEASON, 9 = LATE SEASON) | 12 |
| 9 | LATE SEASON | 819 |