| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
2.2%
|
| 1 | One month or less | 8 |
9%
|
| 2 | 21 |
23.6%
|
|
| 3 | 21 |
23.6%
|
|
| 4 | 14 |
15.7%
|
|
| 5 | 10 |
11.2%
|
|
| 6 | 3 |
3.4%
|
|
| 8 | 1 |
1.1%
|
|
| 9 | 1 |
1.1%
|
|
| 10 | 2 |
2.2%
|
|
| 11 | 1 |
1.1%
|
|
| 12 | 5 |
5.6%
|
|
| Sysmiss | 203 |