| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 3 |
5.5%
|
| 2 | 4 |
7.3%
|
|
| 3 | 15 |
27.3%
|
|
| 4 | 4 |
7.3%
|
|
| 5 | 5 |
9.1%
|
|
| 6 | 7 |
12.7%
|
|
| 7 | 3 |
5.5%
|
|
| 8 | 12 |
21.8%
|
|
| 9 | 1 |
1.8%
|
|
| 11 | 1 |
1.8%
|
|
| Sysmiss | 309 |