| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 9 |
8.7%
|
| 0 | 5 |
4.8%
|
|
| 10 | 1 |
1%
|
|
| 20 | 2 |
1.9%
|
|
| 25 | 1 |
1%
|
|
| 30 | 4 |
3.8%
|
|
| 40 | 4 |
3.8%
|
|
| 50 | 13 |
12.5%
|
|
| 55 | 1 |
1%
|
|
| 60 | 15 |
14.4%
|
|
| 70 | 21 |
20.2%
|
|
| 75 | 1 |
1%
|
|
| 80 | 15 |
14.4%
|
|
| 90 | 3 |
2.9%
|
|
| 100 | 9 |
8.7%
|
|
| Sysmiss | 273 |