| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Spontaneously | 1990 | 156935 |
33.4%
|
| 2 | After probe | 2345 | 192778 |
41.1%
|
| 3 | No | 1394 | 119690 |
25.5%
|
| Sysmiss | 32360 | 0 |