| Value | Category | Cases | |
|---|---|---|---|
| 1 | Years | 513 |
87.2%
|
| 2 | Months | 52 |
8.8%
|
| 98 | Don't know/Not sure | 21 |
3.6%
|
| 99 | Refused to respond | 2 |
0.3%
|