| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 18537 |
96.4%
|
| 1 | Often | 99 |
0.5%
|
| 2 | Sometimes | 430 |
2.2%
|
| 3 | Not at all | 119 |
0.6%
|
| 4 | Yes, widow/frequency missing | 41 |
0.2%
|
| 9 | Missing | 163 | |
| Sysmiss | 15207 |