| Value | Category | Cases | |
|---|---|---|---|
| 1 | did not miss è | 2645 | 
                                                         
                                
                                13.8%
                                                             
                                                     | 
                                            
| 2 | only a few days | 866 | 
                                                         
                                
                                4.5%
                                                             
                                                     | 
                                            
| 3 | from 1 week to 1 month | 111 | 
                                                         
                                
                                0.6%
                                                             
                                                     | 
                                            
| 4 | from 1 month to several months | 21 | 
                                                         
                                
                                0.1%
                                                             
                                                     | 
                                            
| 11 | 15521 | 
                                                         
                                
                                81%
                                                             
                                                     |