| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 18074 |
94.1%
|
| 1 | Often | 113 |
0.6%
|
| 2 | Sometimes | 726 |
3.8%
|
| 3 | Not at all | 223 |
1.2%
|
| 4 | Yes, widow/frequency missing | 79 |
0.4%
|
| 9 | Missing | 174 | |
| Sysmiss | 15207 |