| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 |
0.3%
|
|
| 9 | 3 |
1%
|
|
| 10 | 1 |
0.3%
|
|
| 18 | 1 |
0.3%
|
|
| 30 | 1 |
0.3%
|
|
| Missing value | 308 |
97.8%
|