| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 46 |
17.2%
|
| 0 | None | 42 |
15.7%
|
| 1 | 41 |
15.3%
|
|
| 2 | 20 |
7.5%
|
|
| 3 | 8 |
3%
|
|
| 4 | 1 |
0.4%
|
|
| 5 | 23 |
8.6%
|
|
| 6 | 1 |
0.4%
|
|
| 7 | 2 |
0.7%
|
|
| 8 | 2 |
0.7%
|
|
| 10 | 28 |
10.4%
|
|
| 12 | 1 |
0.4%
|
|
| 14 | 1 |
0.4%
|
|
| 15 | 5 |
1.9%
|
|
| 20 | 23 |
8.6%
|
|
| 22 | 1 |
0.4%
|
|
| 25 | 1 |
0.4%
|
|
| 30 | 7 |
2.6%
|
|
| 40 | 5 |
1.9%
|
|
| 50 | 5 |
1.9%
|
|
| 60 | 1 |
0.4%
|
|
| 70 | 2 |
0.7%
|
|
| 99 | 1 |
0.4%
|
|
| 100 | 1 |
0.4%
|
|
| Sysmiss | 828 |