| Code | Definition | Number of Accessions |
| 1 | 1= [flat], 2= [flat to rounded], 3= [rounded], 4= [rounded to cronical], 5= [cronical] | 13 |
| 2 | 1= [flat], 2= [flat to rounded], 3= [rounded], 4= [rounded to cronical], 5= [cronical] | 47 |
| 3 | 1= [flat], 2= [flat to rounded], 3= [rounded], 4= [rounded to cronical], 5= [cronical] | 26 |
| 4 | 1= [flat], 2= [flat to rounded], 3= [rounded], 4= [rounded to cronical], 5= [cronical] | 1 |