| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 |
6.2%
|
| 1 | 2 |
2.5%
|
|
| 3 | 6 |
7.4%
|
|
| 4 | 1 |
1.2%
|
|
| 5 | 6 |
7.4%
|
|
| 7 | 14 |
17.3%
|
|
| 10 | 1 |
1.2%
|
|
| 14 | 20 |
24.7%
|
|
| 18 | 1 |
1.2%
|
|
| 20 | 4 |
4.9%
|
|
| 21 | 2 |
2.5%
|
|
| 30 | 6 |
7.4%
|
|
| 31 | 5 |
6.2%
|
|
| 60 | 5 |
6.2%
|
|
| 62 | 1 |
1.2%
|
|
| 90 | 2 |
2.5%
|
|
| Sysmiss | 541 |