| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | None | 184 |
52.1%
|
| 1 | 107 |
30.3%
|
|
| 2 | 46 |
13%
|
|
| 3 | 10 |
2.8%
|
|
| 4 | 4 |
1.1%
|
|
| 5 | 2 |
0.6%
|
|
| Sysmiss | 8 |