| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 26 |
22.2%
|
| 0 | 6 |
5.1%
|
|
| 1 | 8 |
6.8%
|
|
| 2 | 8 |
6.8%
|
|
| 3 | 9 |
7.7%
|
|
| 4 | 12 |
10.3%
|
|
| 5 | 8 |
6.8%
|
|
| 6 | 5 |
4.3%
|
|
| 7 | 3 |
2.6%
|
|
| 8 | 6 |
5.1%
|
|
| 10 | 12 |
10.3%
|
|
| 12 | 1 |
0.9%
|
|
| 15 | 4 |
3.4%
|
|
| 18 | 2 |
1.7%
|
|
| 20 | 2 |
1.7%
|
|
| 25 | 1 |
0.9%
|
|
| 30 | 2 |
1.7%
|
|
| 40 | 2 |
1.7%
|
|
| Sysmiss | 242 |