| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
9.1%
|
| -6 | Still in progress | 0 |
0%
|
| 1 | One week or less | 12 |
15.6%
|
| 2 | 4 |
5.2%
|
|
| 3 | 1 |
1.3%
|
|
| 4 | 17 |
22.1%
|
|
| 6 | 2 |
2.6%
|
|
| 8 | 23 |
29.9%
|
|
| 11 | 1 |
1.3%
|
|
| 12 | 6 |
7.8%
|
|
| 20 | 1 |
1.3%
|
|
| 21 | 1 |
1.3%
|
|
| 30 | 2 |
2.6%
|
|
| Sysmiss | 228 |