| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 27 |
4.7%
|
| 0 | 414 |
71.5%
|
|
| 1 | 4 |
0.7%
|
|
| 2 | 2 |
0.3%
|
|
| 3 | 1 |
0.2%
|
|
| 4 | 1 |
0.2%
|
|
| 5 | 7 |
1.2%
|
|
| 10 | 13 |
2.2%
|
|
| 15 | 3 |
0.5%
|
|
| 20 | 11 |
1.9%
|
|
| 22 | 1 |
0.2%
|
|
| 25 | 1 |
0.2%
|
|
| 30 | 22 |
3.8%
|
|
| 37 | 1 |
0.2%
|
|
| 40 | 9 |
1.6%
|
|
| 50 | 29 |
5%
|
|
| 60 | 2 |
0.3%
|
|
| 70 | 10 |
1.7%
|
|
| 80 | 7 |
1.2%
|
|
| 90 | 2 |
0.3%
|
|
| 100 | 12 |
2.1%
|
|
| Sysmiss | 2 |