| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 0 | 76 |
84.4%
|
|
| 1 | 2 |
2.2%
|
|
| 2 | 2 |
2.2%
|
|
| 3 | 1 |
1.1%
|
|
| 6 | 1 |
1.1%
|
|
| 7 | 1 |
1.1%
|
|
| 10 | 1 |
1.1%
|
|
| 12 | 1 |
1.1%
|
|
| 20 | 1 |
1.1%
|
|
| 30 | 1 |
1.1%
|
|
| 40 | 1 |
1.1%
|
|
| 60 | 2 |
2.2%
|
|
| Sysmiss | 715 |