| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 2201 |
94.7%
|
| 1 | Yes, once | 91 |
3.9%
|
| 2 | Yes, more than once | 32 |
1.4%
|
| 9 | 30 | ||
| Sysmiss | 2911 |