| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 3 |
3.8%
|
| 1 | One month or less | 19 |
24.1%
|
| 2 | 10 |
12.7%
|
|
| 3 | 9 |
11.4%
|
|
| 4 | 4 |
5.1%
|
|
| 5 | 2 |
2.5%
|
|
| 6 | 14 |
17.7%
|
|
| 8 | 1 |
1.3%
|
|
| 9 | 3 |
3.8%
|
|
| 10 | 1 |
1.3%
|
|
| 11 | 1 |
1.3%
|
|
| 12 | 12 |
15.2%
|
|
| Sysmiss | 241 |