| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 105 |
54.1%
|
| 0 | 6 |
3.1%
|
|
| 2 | 1 |
0.5%
|
|
| 5 | 1 |
0.5%
|
|
| 8 | 1 |
0.5%
|
|
| 10 | 2 |
1%
|
|
| 15 | 3 |
1.5%
|
|
| 17 | 1 |
0.5%
|
|
| 20 | 20 |
10.3%
|
|
| 25 | 6 |
3.1%
|
|
| 30 | 17 |
8.8%
|
|
| 35 | 4 |
2.1%
|
|
| 40 | 10 |
5.2%
|
|
| 44 | 1 |
0.5%
|
|
| 50 | 11 |
5.7%
|
|
| 60 | 3 |
1.5%
|
|
| 70 | 1 |
0.5%
|
|
| 90 | 1 |
0.5%
|
|
| Sysmiss | 286 |