| Value | Category | Cases | |
|---|---|---|---|
| 0 | 12 |
0.8%
|
|
| 1 | 1356 |
91.6%
|
|
| 3 | 30 |
2%
|
|
| 4 | 81 |
5.5%
|
|
| 999 | 1 |
0.1%
|
|
| Sysmiss | 90 |