| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
2.1%
|
| 1 | One month or less | 50 |
11.7%
|
| 2 | 41 |
9.6%
|
|
| 3 | 117 |
27.3%
|
|
| 4 | 60 |
14%
|
|
| 5 | 23 |
5.4%
|
|
| 6 | 68 |
15.9%
|
|
| 7 | 4 |
0.9%
|
|
| 8 | 12 |
2.8%
|
|
| 9 | 7 |
1.6%
|
|
| 10 | 6 |
1.4%
|
|
| 12 | 31 |
7.2%
|
|
| Sysmiss | 2269 |