| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 2204 |
94.7%
|
| 1 | Yes, once | 74 |
3.2%
|
| 2 | Yes, more than once | 50 |
2.1%
|
| 9 | 26 | ||
| Sysmiss | 2911 |