| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 21 |
0.6%
|
| 2 | Months | 748 |
20%
|
| 3 | Weeks | 35 |
0.9%
|
| 4 | Years | 2194 |
58.6%
|
| 6 | Don't know | 561 |
15%
|
| 7 | Not Applicable | 148 |
4%
|
| 8 | Refused | 10 |
0.3%
|
| 9 | Missing | 28 |
0.7%
|
| Sysmiss | 74610 |