| Value | Category | Cases | |
|---|---|---|---|
| 0 | 18992 |
98.6%
|
|
| 1 | 232 |
1.2%
|
|
| 2 | 15 |
0.1%
|
|
| 3 | 13 |
0.1%
|
|
| 4 | 4 |
0%
|
|
| Sysmiss | 3982 |