| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 6123 |
57.2%
|
| 2 | MORE THAN ONCE | 1526 |
14.3%
|
| 9 | NO RESPONSE | 2 |
0%
|
| Sysmiss | 3052 |
28.5%
|