| Value | Category | Cases | |
|---|---|---|---|
| 0 | 800 |
66.4%
|
|
| 1 | 37 |
3.1%
|
|
| 2 | 11 |
0.9%
|
|
| 3 | 2 |
0.2%
|
|
| 9 | 1 |
0.1%
|
|
| 9999 | 1 |
0.1%
|
|
| Missing value | 353 |
29.3%
|