| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 7 |
9.3%
|
| -6 | Still in progress | 0 |
0%
|
| 1 | One week or less | 12 |
16%
|
| 2 | 3 |
4%
|
|
| 3 | 1 |
1.3%
|
|
| 4 | 17 |
22.7%
|
|
| 6 | 2 |
2.7%
|
|
| 8 | 22 |
29.3%
|
|
| 11 | 1 |
1.3%
|
|
| 12 | 6 |
8%
|
|
| 20 | 1 |
1.3%
|
|
| 21 | 1 |
1.3%
|
|
| 30 | 2 |
2.7%
|
|
| Sysmiss | 217 |