| Value | Category | Cases | |
|---|---|---|---|
| 30 | 3 |
3.3%
|
|
| 40 | 1 |
1.1%
|
|
| 50 | 27 |
29.7%
|
|
| 60 | 26 |
28.6%
|
|
| 70 | 24 |
26.4%
|
|
| 80 | 10 |
11%
|
|
| Sysmiss | 28 |