| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| 0 | Less than 1 month | 0 |
0%
|
| 6 | 63 |
94%
|
|
| 9 | 1 |
1.5%
|
|
| 12 | 3 |
4.5%
|