| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Unknown; Inappropiate | 0 | 
                                    
                                    0%
                                 | 
| -4 | Not asked | 0 | 
                                    
                                    0%
                                 | 
| -3 | Not applicable | 0 | 
                                    
                                    0%
                                 | 
| -2 | No answer | 0 | 
                                    
                                    0%
                                 | 
| -1 | Don´t know | 0 | 
                                    
                                    0%
                                 | 
| 1 | Upper | 32 | 
                                    
                                    3.5%
                                 | 
| 2 | Middle | 340 | 
                                    
                                    37.4%
                                 | 
| 3 | Skilled | 474 | 
                                    
                                    52.1%
                                 | 
| 4 | Unskill | 63 | 
                                    
                                    6.9%
                                 | 
| Sysmiss | 29 |