| Value | Category | Cases | |
|---|---|---|---|
| 0 | 4 |
80%
|
|
| 12 | 1 |
20%
|
|
| 99 | N/R | 0 |
0%
|
| 888 | Don't know | 0 |
0%
|
| 999 | N/A | 0 |
0%
|
| Sysmiss | 1194 |