| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. none | 566 |
13%
|
| 1 | 1. highest | 1553 |
35.6%
|
| 2 | 2. middle | 1254 |
28.8%
|
| 3 | 3. lowest | 988 |
22.7%
|
| Sysmiss | 177 |