| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 2 |
0.7%
|
| -9 | Don't know (spontaneous) | 39 |
13.7%
|
| 0 | 16 |
5.6%
|
|
| 1 | 12 |
4.2%
|
|
| 2 | 26 |
9.2%
|
|
| 3 | 15 |
5.3%
|
|
| 4 | 81 |
28.5%
|
|
| 5 | 8 |
2.8%
|
|
| 6 | 4 |
1.4%
|
|
| 7 | 2 |
0.7%
|
|
| 8 | 32 |
11.3%
|
|
| 9 | 1 |
0.4%
|
|
| 10 | 5 |
1.8%
|
|
| 12 | 15 |
5.3%
|
|
| 16 | 3 |
1.1%
|
|
| 20 | 1 |
0.4%
|
|
| 21 | 1 |
0.4%
|
|
| 24 | 11 |
3.9%
|
|
| 28 | 1 |
0.4%
|
|
| 30 | 1 |
0.4%
|
|
| 32 | 1 |
0.4%
|
|
| 48 | 3 |
1.1%
|
|
| 52 | 1 |
0.4%
|
|
| 53 | 2 |
0.7%
|
|
| 182 | 1 |
0.4%
|
|
| Sysmiss | 76 |