| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 1 | 1 |
2.1%
|
|
| 2 | 6 |
12.8%
|
|
| 4 | 12 |
25.5%
|
|
| 8 | 9 |
19.1%
|
|
| 9 | 1 |
2.1%
|
|
| 12 | 14 |
29.8%
|
|
| 16 | 1 |
2.1%
|
|
| 18 | 1 |
2.1%
|
|
| 20 | 1 |
2.1%
|
|
| 34 | 1 |
2.1%
|
|
| Sysmiss | 103 |