| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 16 |
34%
|
| 2 | 4 |
8.5%
|
|
| 3 | 10 |
21.3%
|
|
| 4 | 3 |
6.4%
|
|
| 5 | 2 |
4.3%
|
|
| 6 | 5 |
10.6%
|
|
| 8 | 2 |
4.3%
|
|
| 9 | 2 |
4.3%
|
|
| 12 | 3 |
6.4%
|
|
| Sysmiss | 103 |