| Value | Category | Cases | |
|---|---|---|---|
| -777 | Not applicable | 4 |
0.1%
|
| 0 | No | 658 |
22.4%
|
| 1 | Yes | 2139 |
72.7%
|
| 2 | Could not observe the pot | 141 |
4.8%
|
| Sysmiss | 474 |