| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don?t know | 0 |
0%
|
| 0 | Less than 1 month | 0 |
0%
|
| 3 | 3 |
2.5%
|
|
| 6 | 112 |
93.3%
|
|
| 12 | 4 |
3.3%
|
|
| 24 | 1 |
0.8%
|