| Value | Category | Cases | |
|---|---|---|---|
| 1 | Days | 21 |
0.5%
|
| 2 | Months | 748 |
17.1%
|
| 3 | Weeks | 35 |
0.8%
|
| 4 | Years | 2194 |
50.3%
|
| 6 | Don't know | 561 |
12.9%
|
| 7 | Not Applicable | 765 |
17.5%
|
| 8 | Refused | 10 |
0.2%
|
| 9 | Missing | 29 |
0.7%
|
| Sysmiss | 73993 |