| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 473 |
89.2%
|
|
| 2 | 2 |
0.4%
|
|
| 5 | 8 |
1.5%
|
|
| 10 | 24 |
4.5%
|
|
| 15 | 3 |
0.6%
|
|
| 20 | 9 |
1.7%
|
|
| 30 | 4 |
0.8%
|
|
| 40 | 1 |
0.2%
|
|
| 50 | 2 |
0.4%
|
|
| 65 | 1 |
0.2%
|
|
| 70 | 1 |
0.2%
|
|
| 80 | 1 |
0.2%
|
|
| 90 | 1 |
0.2%
|
|
| Sysmiss | 70 |