| Value | Category | Cases | |
|---|---|---|---|
| 0 | No records kept | 60 |
25.6%
|
| 1 | Yes, always | 104 |
44.4%
|
| 2 | Yes, sometimes | 64 |
27.4%
|
| 3 | Someone else keeps records | 6 |
2.6%
|
| Sysmiss | 2958 |