| Value | Category | Cases | |
|---|---|---|---|
| 0 | 447 |
89.4%
|
|
| 1 | 40 |
8%
|
|
| 2 | 8 |
1.6%
|
|
| 3 | 3 |
0.6%
|
|
| 5 | 1 |
0.2%
|
|
| 6 | 1 |
0.2%
|
|
| Missing value | 224 |