| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 15 |
6.3%
|
| 0 | 22 |
9.2%
|
|
| 5 | 6 |
2.5%
|
|
| 6 | 1 |
0.4%
|
|
| 9 | 1 |
0.4%
|
|
| 10 | 11 |
4.6%
|
|
| 15 | 3 |
1.3%
|
|
| 20 | 21 |
8.8%
|
|
| 22 | 1 |
0.4%
|
|
| 30 | 29 |
12.1%
|
|
| 40 | 23 |
9.6%
|
|
| 50 | 25 |
10.4%
|
|
| 60 | 8 |
3.3%
|
|
| 70 | 28 |
11.7%
|
|
| 80 | 17 |
7.1%
|
|
| 85 | 1 |
0.4%
|
|
| 90 | 7 |
2.9%
|
|
| 100 | 21 |
8.8%
|
|
| Sysmiss | 119 |