| Value | Category | Cases | |
|---|---|---|---|
| 9 | 1 |
20%
|
|
| 20 | 2 |
40%
|
|
| 55 | 1 |
20%
|
|
| 70 | 1 |
20%
|
|
| 97 | Refused | 0 |
0%
|
| 98 | Don't know | 0 |
0%
|
| 99 | Missing | 0 |
0%
|
| Sysmiss | 1720 |