| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2 |
0.8%
|
|
| 2 | 1 |
0.4%
|
|
| 4 | 1 |
0.4%
|
|
| 13 | 1 |
0.4%
|
|
| 50 | 1 |
0.4%
|
|
| 80 | 1 |
0.4%
|
|
| Missing value | 251 |
97.3%
|