| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 18417 |
95.8%
|
| 1 | Often | 87 |
0.5%
|
| 2 | Sometimes | 492 |
2.6%
|
| 3 | Not at all | 178 |
0.9%
|
| 4 | Yes, widow/frequency missing | 44 |
0.2%
|
| 9 | Missing | 171 | |
| Sysmiss | 15207 |