| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 52 |
8.8%
|
|
| 1 | 253 |
43%
|
|
| 2 | 147 |
25%
|
|
| 3 | 72 |
12.2%
|
|
| 4 | 24 |
4.1%
|
|
| 5 | 22 |
3.7%
|
|
| 6 | 12 |
2%
|
|
| 8 | 4 |
0.7%
|
|
| 15 | 2 |
0.3%
|
|
| Sysmiss | 712 |