| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. None | 0 |
0%
|
| 1 | 1 |
10%
|
|
| 2 | 4 |
40%
|
|
| 4 | 1 |
10%
|
|
| 99 | 99. Don't know | 4 |
40%
|
| Sysmiss | 224 |