| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 441 |
29.8%
|
| 2 | MORE THAN ONCE | 22 |
1.5%
|
| 9 | NO RESPONSE | 1 |
0.1%
|
| Sysmiss | 1015 |
68.6%
|