| Value | Category | Cases | |
|---|---|---|---|
| 1 | ONLY ONCE | 1777 |
32.5%
|
| 2 | MORE THAN ONCE | 802 |
14.6%
|
| 9 | NO RESPONSE | 5 |
0.1%
|
| Sysmiss | 2892 |
52.8%
|