| Value | Category | Cases | |
|---|---|---|---|
| 0 | Never | 265 |
16.3%
|
| 1 | Once or twice | 118 |
7.3%
|
| 2 | Three times or more | 12 |
0.7%
|
| Sysmiss | 1230 |
75.6%
|
|
| r | 1 |
0.1%
|