| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 302 |
8.1%
|
| 2 | Months | 1432 |
38.2%
|
| 3 | Weeks | 508 |
13.6%
|
| 4 | Years | 707 |
18.9%
|
| 6 | Don't know | 553 |
14.8%
|
| 7 | Not Applicable | 162 |
4.3%
|
| 8 | Refused | 20 |
0.5%
|
| 9 | Missing | 61 |
1.6%
|
| Sysmiss | 74610 |