| Value | Category | Cases | |
|---|---|---|---|
| 0 | 9 |
0.3%
|
|
| 1 | 13 |
0.4%
|
|
| 2 | 68 |
2.2%
|
|
| 3 | 144 |
4.7%
|
|
| 4 | 2824 |
92.3%
|
|
| Sysmiss | 18431 |