| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 1 |
0.9%
|
| -9 | Don't know (spontaneous) | 5 |
4.7%
|
| 0 | 18 |
16.8%
|
|
| 1 | 19 |
17.8%
|
|
| 2 | 6 |
5.6%
|
|
| 3 | 15 |
14%
|
|
| 4 | 4 |
3.7%
|
|
| 5 | 6 |
5.6%
|
|
| 6 | 9 |
8.4%
|
|
| 7 | 2 |
1.9%
|
|
| 8 | 3 |
2.8%
|
|
| 10 | 4 |
3.7%
|
|
| 11 | 1 |
0.9%
|
|
| 12 | 1 |
0.9%
|
|
| 13 | 1 |
0.9%
|
|
| 15 | 1 |
0.9%
|
|
| 20 | 3 |
2.8%
|
|
| 24 | 1 |
0.9%
|
|
| 30 | 2 |
1.9%
|
|
| 38 | 1 |
0.9%
|
|
| 62 | 1 |
0.9%
|
|
| 72 | 1 |
0.9%
|
|
| 180 | 2 |
1.9%
|
|
| Sysmiss | 253 |