| Value | Category | Cases | |
|---|---|---|---|
| -99 | -99 (don't know) | 0 |
0%
|
| -88 | Other | 2 |
10%
|
| 1 | Day | 0 |
0%
|
| 2 | Week | 1 |
5%
|
| 3 | Month | 16 |
80%
|
| 4 | Season | 0 |
0%
|
| 5 | Year | 1 |
5%
|
| Sysmiss | 1096 |