| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 9 |
5.4%
|
| 0 | 92 |
55.4%
|
|
| 1 | 38 |
22.9%
|
|
| 2 | 7 |
4.2%
|
|
| 3 | 1 |
0.6%
|
|
| 5 | 8 |
4.8%
|
|
| 8 | 1 |
0.6%
|
|
| 10 | 1 |
0.6%
|
|
| 15 | 1 |
0.6%
|
|
| 20 | 2 |
1.2%
|
|
| 40 | 1 |
0.6%
|
|
| 50 | 1 |
0.6%
|
|
| 60 | 1 |
0.6%
|
|
| 65 | 1 |
0.6%
|
|
| 100 | 2 |
1.2%
|
|
| Sysmiss | 443 |