| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
1.2%
|
| 1 | One month or less | 177 |
10.8%
|
| 2 | 244 |
14.9%
|
|
| 3 | 525 |
32%
|
|
| 4 | 130 |
7.9%
|
|
| 5 | 64 |
3.9%
|
|
| 6 | 292 |
17.8%
|
|
| 7 | 19 |
1.2%
|
|
| 8 | 48 |
2.9%
|
|
| 9 | 16 |
1%
|
|
| 10 | 12 |
0.7%
|
|
| 11 | 4 |
0.2%
|
|
| 12 | 92 |
5.6%
|
|
| Sysmiss | 992 |