| Value | Category | Cases | |
|---|---|---|---|
| 1 | No never | 2465 | 
                                                                 
                                    
                                    31.2%
                                 
                                                             | 
                                                        
                    
| 2 | Not more than usual | 2556 | 
                                                                 
                                    
                                    32.3%
                                 
                                                             | 
                                                        
                    
| 3 | More than usual | 2425 | 
                                                                 
                                    
                                    30.7%
                                 
                                                             | 
                                                        
                    
| 4 | Much more than usual | 460 | 
                                                                 
                                    
                                    5.8%
                                 
                                                             | 
                                                        
                    
| Sysmiss | 3 |