| Value | Category | Cases | |
|---|---|---|---|
| 1 | Day | 6 |
18.8%
|
| 2 | Week | 2 |
6.3%
|
| 3 | Month | 18 |
56.3%
|
| 4 | Year | 6 |
18.8%
|
| 9 | Missing | 0 |
0%
|
| Sysmiss | 987 |