| Value | Category | Cases | |
|---|---|---|---|
| -9 | do not know | 0 |
0%
|
| 15 | 1 |
9.1%
|
|
| 20 | 2 |
18.2%
|
|
| 30 | 2 |
18.2%
|
|
| 80 | 2 |
18.2%
|
|
| 90 | 1 |
9.1%
|
|
| 100 | 3 |
27.3%
|
|
| Sysmiss | 137 |