| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | None | 70 |
74.5%
|
| 1 | 6 |
6.4%
|
|
| 2 | 3 |
3.2%
|
|
| 3 | 1 |
1.1%
|
|
| 4 | 1 |
1.1%
|
|
| 5 | 1 |
1.1%
|
|
| 7 | 1 |
1.1%
|
|
| 10 | 9 |
9.6%
|
|
| 20 | 2 |
2.1%
|
|
| Sysmiss | 930 |