| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 19 |
6.7%
|
| 0 | 168 |
59.4%
|
|
| 1 | 20 |
7.1%
|
|
| 2 | 7 |
2.5%
|
|
| 3 | 5 |
1.8%
|
|
| 5 | 13 |
4.6%
|
|
| 6 | 1 |
0.4%
|
|
| 7 | 2 |
0.7%
|
|
| 8 | 1 |
0.4%
|
|
| 10 | 13 |
4.6%
|
|
| 15 | 1 |
0.4%
|
|
| 17 | 1 |
0.4%
|
|
| 20 | 10 |
3.5%
|
|
| 22 | 1 |
0.4%
|
|
| 30 | 1 |
0.4%
|
|
| 34 | 1 |
0.4%
|
|
| 40 | 1 |
0.4%
|
|
| 50 | 8 |
2.8%
|
|
| 70 | 1 |
0.4%
|
|
| 80 | 1 |
0.4%
|
|
| 90 | 1 |
0.4%
|
|
| 100 | 7 |
2.5%
|
|
| Sysmiss | 77 |