| Value | Category | Cases | |
|---|---|---|---|
| 0 | 43 |
30.3%
|
|
| 2 | 1 |
0.7%
|
|
| 30 | 93 |
65.5%
|
|
| 31 | 4 |
2.8%
|
|
| 60 | 1 |
0.7%
|
|
| Sysmiss | 67 |