| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. None | 0 |
0%
|
| 2 | 4 |
40%
|
|
| 3 | 2 |
20%
|
|
| 99 | 99. Don't know | 4 |
40%
|
| Sysmiss | 224 |