| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 1189 |
95.5%
|
| 1 | Yes, once | 42 |
3.4%
|
| 2 | Yes, more than once | 14 |
1.1%
|
| 9 | 6 | ||
| Sysmiss | 180 |