| Value | Category | Cases | |
|---|---|---|---|
| 1 | At once | 229 |
93.1%
|
| 2 | Within a month | 9 |
3.7%
|
| 3 | Later than a month | 4 |
1.6%
|
| 4 | Don't know | 4 |
1.6%
|
| Sysmiss | [.a] invalid code | 0 | |
| Sysmiss | 40362 |