| Value | Category | Cases | |
|---|---|---|---|
| 0 | 637 |
13.7%
|
|
| 1 | 9 |
0.2%
|
|
| 2 | 3 |
0.1%
|
|
| 3 | 11 |
0.2%
|
|
| Missing value | 4000 |
85.8%
|