| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | One month or less | 95 |
24.2%
|
| 2 | 16 |
4.1%
|
|
| 3 | 87 |
22.1%
|
|
| 4 | 16 |
4.1%
|
|
| 5 | 1 |
0.3%
|
|
| 6 | 108 |
27.5%
|
|
| 8 | 24 |
6.1%
|
|
| 9 | 2 |
0.5%
|
|
| 10 | 4 |
1%
|
|
| 11 | 4 |
1%
|
|
| 12 | 36 |
9.2%
|
|
| Sysmiss | 907 |