| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 11 |
9.5%
|
| 1 | 9 |
7.8%
|
|
| 2 | 5 |
4.3%
|
|
| 3 | 7 |
6%
|
|
| 4 | 1 |
0.9%
|
|
| 5 | 11 |
9.5%
|
|
| 7 | 12 |
10.3%
|
|
| 8 | 2 |
1.7%
|
|
| 10 | 10 |
8.6%
|
|
| 14 | 16 |
13.8%
|
|
| 15 | 1 |
0.9%
|
|
| 20 | 2 |
1.7%
|
|
| 21 | 3 |
2.6%
|
|
| 25 | 2 |
1.7%
|
|
| 28 | 1 |
0.9%
|
|
| 30 | 15 |
12.9%
|
|
| 45 | 1 |
0.9%
|
|
| 60 | 5 |
4.3%
|
|
| 90 | 2 |
1.7%
|
|
| Sysmiss | 484 |