| Value | Category | Cases | |
|---|---|---|---|
| 0 | 12 |
6.6%
|
|
| 1 | 150 |
82.9%
|
|
| 2 | 18 |
9.9%
|
|
| 4 | 1 |
0.6%
|
|
| Missing value | 21 |