| Value | Category | 
|---|---|
| -5 | HT: Dropped out survey; RU,DE: Inappropriate response | 
| -4 | Not asked in survey | 
| -3 | Not applicable | 
| -2 | No answer | 
| -1 | Don´t know | 
| 1 | Disagree strongly | 
| 2 | Disagree a little | 
| 3 | Neither agree nor disagree | 
| 4 | Agree a little | 
| 5 | Agree Strongly | 
| Sysmiss |