| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 16 |
19%
|
| 0 | 4 |
4.8%
|
|
| 1 | 5 |
6%
|
|
| 2 | 3 |
3.6%
|
|
| 3 | 2 |
2.4%
|
|
| 4 | 1 |
1.2%
|
|
| 5 | 4 |
4.8%
|
|
| 7 | 3 |
3.6%
|
|
| 8 | 1 |
1.2%
|
|
| 10 | 13 |
15.5%
|
|
| 11 | 1 |
1.2%
|
|
| 12 | 2 |
2.4%
|
|
| 15 | 3 |
3.6%
|
|
| 18 | 3 |
3.6%
|
|
| 20 | 8 |
9.5%
|
|
| 21 | 1 |
1.2%
|
|
| 25 | 2 |
2.4%
|
|
| 28 | 1 |
1.2%
|
|
| 30 | 4 |
4.8%
|
|
| 40 | 2 |
2.4%
|
|
| 50 | 3 |
3.6%
|
|
| 63 | 1 |
1.2%
|
|
| 95 | 1 |
1.2%
|
|
| Sysmiss | 279 |