| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 3988 |
69.2%
|
| 2 | MORE THAN ONCE | 872 |
15.1%
|
| 9 | NO RESPONSE | 6 |
0.1%
|
| Sysmiss | 899 |
15.6%
|