| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 20 |
6.6%
|
| 0 | None | 86 |
28.5%
|
| 1 | 114 |
37.7%
|
|
| 2 | 22 |
7.3%
|
|
| 3 | 1 |
0.3%
|
|
| 5 | 15 |
5%
|
|
| 10 | 13 |
4.3%
|
|
| 15 | 2 |
0.7%
|
|
| 20 | 6 |
2%
|
|
| 25 | 2 |
0.7%
|
|
| 30 | 5 |
1.7%
|
|
| 35 | 2 |
0.7%
|
|
| 40 | 3 |
1%
|
|
| 50 | 4 |
1.3%
|
|
| 60 | 3 |
1%
|
|
| 75 | 1 |
0.3%
|
|
| 85 | 1 |
0.3%
|
|
| 95 | 1 |
0.3%
|
|
| 100 | 1 |
0.3%
|
|
| Sysmiss | 2653 |