| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Spontaneously | 57 | 4959 |
1.1%
|
| 2 | After probe | 2670 | 213118 |
45.4%
|
| 3 | No | 2999 | 251142 |
53.5%
|
| 9 | Missing | 3 | 184 |
0%
|
| Sysmiss | 32360 | 0 |