| Value | Category | Cases | |
|---|---|---|---|
| -2 | Refusal to answer | 0 |
0%
|
| -1 | Don't know | 0 |
0%
|
| 0 | 1 |
0.5%
|
|
| 5 | 7 |
3.4%
|
|
| 6 | 1 |
0.5%
|
|
| 7 | 1 |
0.5%
|
|
| 8 | 1 |
0.5%
|
|
| 10 | 8 |
3.9%
|
|
| 15 | 2 |
1%
|
|
| 20 | 19 |
9.3%
|
|
| 21 | 2 |
1%
|
|
| 22 | 16 |
7.8%
|
|
| 23 | 2 |
1%
|
|
| 24 | 24 |
11.7%
|
|
| 25 | 30 |
14.6%
|
|
| 26 | 19 |
9.3%
|
|
| 27 | 2 |
1%
|
|
| 28 | 16 |
7.8%
|
|
| 30 | 53 |
25.9%
|
|
| 31 | 1 |
0.5%
|
|
| Sysmiss | 2 |