| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 22578 |
97.6%
|
| 1 | Yes, once | 255 |
1.1%
|
| 2 | Yes, more than once | 289 |
1.2%
|
| 9 | Missing | 630 | |
| Sysmiss | 10844 |