| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 |
0.3%
|
|
| 2 | 3 |
0.9%
|
|
| 3 | 12 |
3.4%
|
|
| 4 | 62 |
17.8%
|
|
| Missing value | 271 |
77.7%
|