| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don?t know | 0 |
0%
|
| 0 | Less than 1 month | 0 |
0%
|
| 6 | 66 |
55%
|
|
| 7 | 31 |
25.8%
|
|
| 8 | 6 |
5%
|
|
| 9 | 6 |
5%
|
|
| 10 | 1 |
0.8%
|
|
| 11 | 1 |
0.8%
|
|
| 12 | 7 |
5.8%
|
|
| 18 | 2 |
1.7%
|