| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 21 |
9.9%
|
| 0 | None | 17 |
8%
|
| 1 | 2 |
0.9%
|
|
| 2 | 2 |
0.9%
|
|
| 3 | 1 |
0.5%
|
|
| 5 | 17 |
8%
|
|
| 6 | 2 |
0.9%
|
|
| 9 | 1 |
0.5%
|
|
| 10 | 26 |
12.2%
|
|
| 15 | 14 |
6.6%
|
|
| 20 | 17 |
8%
|
|
| 25 | 3 |
1.4%
|
|
| 28 | 2 |
0.9%
|
|
| 30 | 16 |
7.5%
|
|
| 40 | 9 |
4.2%
|
|
| 50 | 10 |
4.7%
|
|
| 60 | 11 |
5.2%
|
|
| 70 | 8 |
3.8%
|
|
| 75 | 1 |
0.5%
|
|
| 80 | 15 |
7%
|
|
| 89 | 1 |
0.5%
|
|
| 90 | 7 |
3.3%
|
|
| 100 | 10 |
4.7%
|
|
| Sysmiss | 387 |