| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 |
8%
|
| -6 | Still in progress | 0 |
0%
|
| 1 | One week or less | 21 |
42%
|
| 2 | 7 |
14%
|
|
| 3 | 3 |
6%
|
|
| 4 | 5 |
10%
|
|
| 5 | 1 |
2%
|
|
| 6 | 1 |
2%
|
|
| 12 | 2 |
4%
|
|
| 15 | 1 |
2%
|
|
| 24 | 1 |
2%
|
|
| 30 | 4 |
8%
|
|
| Sysmiss | 301 |