| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
1%
|
| -7 | No internal shipments made (does not apply) | 26 |
6.4%
|
| 0 | No losses | 368 |
90%
|
| 1 | 5 |
1.2%
|
|
| 2 | 3 |
0.7%
|
|
| 5 | 3 |
0.7%
|