| Value | Category | Cases | |
|---|---|---|---|
| -5 | Missing; Unknown | 0 | 
                                    
                                    0%
                                 | 
| -4 | Not asked in survey | 0 | 
                                    
                                    0%
                                 | 
| -3 | Not applicable | 0 | 
                                    
                                    0%
                                 | 
| -2 | No answer | 0 | 
                                    
                                    0%
                                 | 
| -1 | Don´t know | 0 | 
                                    
                                    0%
                                 | 
| 1 | 1981-1984 | 0 | 
                                    
                                    0%
                                 | 
| 2 | 1989-1993 | 0 | 
                                    
                                    0%
                                 | 
| 3 | 1994-1999 | 0 | 
                                    
                                    0%
                                 | 
| 4 | 1999-2004 | 0 | 
                                    
                                    0%
                                 | 
| 5 | 2005-2007 | 0 | 
                                    
                                    0%
                                 | 
| 6 | 2010-2013 | 1200 | 
                                    
                                    100%
                                 |