| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.8%
|
| 1 | One month or less | 15 |
12.5%
|
| 2 | 3 |
2.5%
|
|
| 3 | 37 |
30.8%
|
|
| 4 | 8 |
6.7%
|
|
| 5 | 4 |
3.3%
|
|
| 6 | 41 |
34.2%
|
|
| 7 | 3 |
2.5%
|
|
| 8 | 2 |
1.7%
|
|
| 9 | 3 |
2.5%
|
|
| 10 | 2 |
1.7%
|
|
| 12 | 1 |
0.8%
|
|
| Sysmiss | 244 |