| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 4 |
4.2%
|
| 0 | 4 |
4.2%
|
|
| 30 | 1 |
1%
|
|
| 40 | 1 |
1%
|
|
| 50 | 8 |
8.3%
|
|
| 60 | 3 |
3.1%
|
|
| 70 | 8 |
8.3%
|
|
| 80 | 11 |
11.5%
|
|
| 85 | 1 |
1%
|
|
| 87 | 1 |
1%
|
|
| 88 | 1 |
1%
|
|
| 89 | 1 |
1%
|
|
| 90 | 20 |
20.8%
|
|
| 95 | 4 |
4.2%
|
|
| 100 | 28 |
29.2%
|
|
| Sysmiss | 263 |