| Value | Category | Cases | |
|---|---|---|---|
| 0 | 2017 |
46.3%
|
|
| 1 | 686 |
15.7%
|
|
| 2 | 706 |
16.2%
|
|
| 3 | 952 |
21.8%
|
|
| 999 | 999. missing | 0 |
0%
|
| Sysmiss | 177 |