| Value | Category | Cases | |
|---|---|---|---|
| 12 | 1 |
25%
|
|
| 15 | 2 |
50%
|
|
| 20 | 1 |
25%
|
|
| 99 | Don't Know/Refused | 0 |
0%
|
| Sysmiss | 7836 |