| Value | Category | Cases | |
|---|---|---|---|
| 0 | 29 |
0.7%
|
|
| 1 | 146 |
3.6%
|
|
| 2 | 24 |
0.6%
|
|
| 3 | 4 |
0.1%
|
|
| 5 | 1 |
0%
|
|
| 6 | 1 |
0%
|
|
| 20 | 1 |
0%
|
|
| Missing value | 3819 |
94.9%
|