| Value | Category | Cases | |
|---|---|---|---|
| 0 | 0. none | 900 |
20.6%
|
| 1 | 1. low | 1782 |
40.9%
|
| 2 | 2. middle | 1092 |
25%
|
| 3 | 3. highest | 587 |
13.5%
|
| Sysmiss | 177 |