| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 13 |
12.1%
|
| 6 | 1 |
0.9%
|
|
| 7 | 1 |
0.9%
|
|
| 8 | 1 |
0.9%
|
|
| 10 | 1 |
0.9%
|
|
| 14 | 6 |
5.6%
|
|
| 15 | 4 |
3.7%
|
|
| 16 | 11 |
10.3%
|
|
| 17 | 17 |
15.9%
|
|
| 18 | 32 |
29.9%
|
|
| 19 | 9 |
8.4%
|
|
| 20 | 4 |
3.7%
|
|
| 21 | 2 |
1.9%
|
|
| 22 | 1 |
0.9%
|
|
| 23 | 1 |
0.9%
|
|
| 28 | 1 |
0.9%
|
|
| 40 | 1 |
0.9%
|
|
| 80 | 1 |
0.9%
|
|
| Sysmiss | 134 |