| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 3 |
0.9%
|
| 0 | 293 |
85.7%
|
|
| 1 | 5 |
1.5%
|
|
| 2 | 8 |
2.3%
|
|
| 5 | 9 |
2.6%
|
|
| 10 | 7 |
2%
|
|
| 18 | 1 |
0.3%
|
|
| 20 | 2 |
0.6%
|
|
| 25 | 1 |
0.3%
|
|
| 30 | 3 |
0.9%
|
|
| 35 | 1 |
0.3%
|
|
| 50 | 2 |
0.6%
|
|
| 60 | 3 |
0.9%
|
|
| 70 | 1 |
0.3%
|
|
| 100 | 3 |
0.9%
|
|
| Sysmiss | 62 |