| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 |
1.3%
|
| 1 | One month or less | 37 |
24.5%
|
| 2 | 18 |
11.9%
|
|
| 3 | 46 |
30.5%
|
|
| 4 | 15 |
9.9%
|
|
| 5 | 7 |
4.6%
|
|
| 6 | 16 |
10.6%
|
|
| 8 | 3 |
2%
|
|
| 9 | 2 |
1.3%
|
|
| 10 | 1 |
0.7%
|
|
| 12 | 4 |
2.6%
|
|
| Sysmiss | 1574 |