| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 5505 |
98.7%
|
| 1 | Yes, once | 55 |
1%
|
| 2 | Yes, more than once | 18 |
0.3%
|
| 9 | 79 | ||
| Sysmiss | 25422 |