| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 103 |
54.2%
|
| 0 | 6 |
3.2%
|
|
| 2 | 1 |
0.5%
|
|
| 5 | 1 |
0.5%
|
|
| 8 | 1 |
0.5%
|
|
| 10 | 2 |
1.1%
|
|
| 15 | 3 |
1.6%
|
|
| 17 | 1 |
0.5%
|
|
| 20 | 19 |
10%
|
|
| 25 | 6 |
3.2%
|
|
| 30 | 16 |
8.4%
|
|
| 35 | 4 |
2.1%
|
|
| 40 | 10 |
5.3%
|
|
| 44 | 1 |
0.5%
|
|
| 50 | 11 |
5.8%
|
|
| 60 | 3 |
1.6%
|
|
| 70 | 1 |
0.5%
|
|
| 90 | 1 |
0.5%
|
|
| Sysmiss | 284 |