| Value | Category | Cases | |
|---|---|---|---|
| -555 | -555 Other specify | 1 |
0.1%
|
| 1 | 1. Yes | 154 |
10.9%
|
| 2 | 2. No, used it at first, but don’t use it anymore | 43 |
3.1%
|
| Sysmiss | 1210 |
85.9%
|