| Value | Category | Cases | |
|---|---|---|---|
| -1 | True missing | 13 |
0.2%
|
| 0 | 0 | 670 |
12.2%
|
| 1 | 1 | 544 |
9.9%
|
| 2 | 2 | 956 |
17.4%
|
| 3 | 3 | 1003 |
18.3%
|
| 4 | 4 | 691 |
12.6%
|
| 5 | 5 | 1602 |
29.2%
|