| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.5%
|
| 1 | One month or less | 2 |
1.5%
|
| 2 | 16 |
12%
|
|
| 3 | 25 |
18.8%
|
|
| 4 | 13 |
9.8%
|
|
| 5 | 14 |
10.5%
|
|
| 6 | 24 |
18%
|
|
| 7 | 1 |
0.8%
|
|
| 8 | 7 |
5.3%
|
|
| 9 | 2 |
1.5%
|
|
| 10 | 4 |
3%
|
|
| 12 | 23 |
17.3%
|
|
| Sysmiss | 296 |