| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 1 |
1.1%
|
| 2 | 4 |
4.3%
|
|
| 3 | 38 |
40.4%
|
|
| 4 | 11 |
11.7%
|
|
| 5 | 7 |
7.4%
|
|
| 6 | 22 |
23.4%
|
|
| 8 | 4 |
4.3%
|
|
| 9 | 2 |
2.1%
|
|
| 10 | 1 |
1.1%
|
|
| 12 | 4 |
4.3%
|
|
| Sysmiss | 310 |