| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 2 |
0.4%
|
| 0 | 441 |
83.2%
|
|
| 1 | 2 |
0.4%
|
|
| 2 | 4 |
0.8%
|
|
| 3 | 6 |
1.1%
|
|
| 4 | 3 |
0.6%
|
|
| 5 | 21 |
4%
|
|
| 10 | 34 |
6.4%
|
|
| 15 | 1 |
0.2%
|
|
| 20 | 6 |
1.1%
|
|
| 25 | 1 |
0.2%
|
|
| 30 | 5 |
0.9%
|
|
| 40 | 1 |
0.2%
|
|
| 70 | 1 |
0.2%
|
|
| 80 | 1 |
0.2%
|
|
| 95 | 1 |
0.2%
|
|
| Sysmiss | 70 |