| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 7004 |
61.1%
|
| 2 | MORE THAN ONCE | 169 |
1.5%
|
| 9 | NO RESPONSE | 7 |
0.1%
|
| Sysmiss | 4284 |
37.4%
|