| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
5.9%
|
| 1 | One month or less | 40 |
33.9%
|
| 2 | 5 |
4.2%
|
|
| 3 | 26 |
22%
|
|
| 4 | 7 |
5.9%
|
|
| 5 | 3 |
2.5%
|
|
| 6 | 21 |
17.8%
|
|
| 8 | 2 |
1.7%
|
|
| 10 | 2 |
1.7%
|
|
| 11 | 1 |
0.8%
|
|
| 12 | 4 |
3.4%
|
|
| Sysmiss | 284 |