| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
1.2%
|
| 1 | One month or less | 22 |
26.8%
|
| 2 | 14 |
17.1%
|
|
| 3 | 9 |
11%
|
|
| 4 | 2 |
2.4%
|
|
| 5 | 3 |
3.7%
|
|
| 6 | 23 |
28%
|
|
| 7 | 1 |
1.2%
|
|
| 8 | 3 |
3.7%
|
|
| 10 | 1 |
1.2%
|
|
| 12 | 3 |
3.7%
|
|
| Sysmiss | 306 |