| Value | Category | Cases | |
|---|---|---|---|
| 10 | 482 |
14.8%
|
|
| 20 | 89 |
2.7%
|
|
| 30 | 1149 |
35.3%
|
|
| 9999 | 1511 |
46.4%
|
|
| Missing value | 23 |
0.7%
|