| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 10 | 6 |
4.8%
|
|
| 12 | 1 |
0.8%
|
|
| 13 | 1 |
0.8%
|
|
| 15 | 3 |
2.4%
|
|
| 20 | 7 |
5.6%
|
|
| 25 | 8 |
6.4%
|
|
| 30 | 18 |
14.4%
|
|
| 31 | 1 |
0.8%
|
|
| 33 | 1 |
0.8%
|
|
| 35 | 9 |
7.2%
|
|
| 40 | 12 |
9.6%
|
|
| 45 | 2 |
1.6%
|
|
| 50 | 16 |
12.8%
|
|
| 52 | 1 |
0.8%
|
|
| 60 | 6 |
4.8%
|
|
| 65 | 1 |
0.8%
|
|
| 70 | 5 |
4%
|
|
| 75 | 1 |
0.8%
|
|
| 80 | 6 |
4.8%
|
|
| 90 | 5 |
4%
|
|
| 95 | 4 |
3.2%
|
|
| 100 | 11 |
8.8%
|
|
| Sysmiss | 115 |