| Value | Category | Cases | |
|---|---|---|---|
| 1 | Normal both sides | 52837 |
99.2%
|
| 2 | Reduced left side | 29 |
0.1%
|
| 3 | Reduced right side | 9 |
0%
|
| 4 | Reduced both sides | 12 |
0%
|
| 9 | Missing | 387 |
0.7%
|