| Value | Category | Cases | |
|---|---|---|---|
| 1 | No never | 2314 | 
                                                                 
                                    
                                    29.3%
                                 
                                                             | 
                                                        
                    
| 2 | Not more than usual | 2733 | 
                                                                 
                                    
                                    34.6%
                                 
                                                             | 
                                                        
                    
| 3 | More than usual | 2375 | 
                                                                 
                                    
                                    30%
                                 
                                                             | 
                                                        
                    
| 4 | Much more than usual | 485 | 
                                                                 
                                    
                                    6.1%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 2 |