| Value | Category | Cases | |
|---|---|---|---|
| 1 | Less than 12 months | 0 |
0%
|
| 2 | More than 12 months | 0 |
0%
|
| 98 | Don't know | 0 |
0%
|
| 99 | Refuse to answer | 0 |
0%
|
| Missing value | 5007 |
100%
|