| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 549 |
59.2%
|
| 2 | This period | 141 |
15.2%
|
| 3 | Last period | 123 |
13.3%
|
| 4 | 2 periods ago | 33 |
3.6%
|
| 5 | 3 terms ago | 24 |
2.6%
|
| 6 | More than a year ago | 58 |
6.3%
|
| Sysmiss | 16 |