| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 |
0%
|
| -9 | Don't know (spontaneous) | 0 |
0%
|
| 4 | 1 |
4%
|
|
| 5 | 2 |
8%
|
|
| 6 | 1 |
4%
|
|
| 7 | 2 |
8%
|
|
| 8 | 2 |
8%
|
|
| 9 | 1 |
4%
|
|
| 10 | 1 |
4%
|
|
| 12 | 2 |
8%
|
|
| 14 | 1 |
4%
|
|
| 16 | 1 |
4%
|
|
| 17 | 1 |
4%
|
|
| 20 | 1 |
4%
|
|
| 33 | 1 |
4%
|
|
| 40 | 2 |
8%
|
|
| 52 | 1 |
4%
|
|
| 60 | 1 |
4%
|
|
| 75 | 1 |
4%
|
|
| 180 | 1 |
4%
|
|
| 252 | 1 |
4%
|
|
| 300 | 1 |
4%
|
|
| Sysmiss | 217 |