| Value | Category |
|---|---|
| 1 | Lower step |
| 2 | second step |
| 3 | Third step |
| 4 | Fourth step |
| 5 | Fifth step |
| 6 | Sixth step |
| 7 | Seventh step |
| 8 | Eigth step |
| 9 | Nineth step |
| 10 | Upper step |
| -5 | Missing; Not asked by the interviewer |
| -4 | Not asked |
| -3 | Not applicable |
| -2 | No answer |
| -1 | Don´t know |