| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 27 |
6.8%
|
| 0 | 203 |
51%
|
|
| 10 | 6 |
1.5%
|
|
| 15 | 1 |
0.3%
|
|
| 20 | 33 |
8.3%
|
|
| 25 | 7 |
1.8%
|
|
| 30 | 19 |
4.8%
|
|
| 35 | 1 |
0.3%
|
|
| 40 | 19 |
4.8%
|
|
| 50 | 21 |
5.3%
|
|
| 60 | 8 |
2%
|
|
| 65 | 2 |
0.5%
|
|
| 70 | 12 |
3%
|
|
| 75 | 2 |
0.5%
|
|
| 80 | 14 |
3.5%
|
|
| 90 | 8 |
2%
|
|
| 91 | 1 |
0.3%
|
|
| 100 | 14 |
3.5%
|
|
| Sysmiss | 1327 |