| Value | Category | Cases | |
|---|---|---|---|
| 1 | one month or less | 1101 | 
                                                         
                                
                                43.3%
                                                             
                                                     | 
                                            
| 2 | 2 months | 847 | 
                                                         
                                
                                33.3%
                                                             
                                                     | 
                                            
| 3 | 3 months | 139 | 
                                                         
                                
                                5.5%
                                                             
                                                     | 
                                            
| 4 | 4 months | 73 | 
                                                         
                                
                                2.9%
                                                             
                                                     | 
                                            
| 5 | 5 months | 55 | 
                                                         
                                
                                2.2%
                                                             
                                                     | 
                                            
| 6 | 6 months | 47 | 
                                                         
                                
                                1.8%
                                                             
                                                     | 
                                            
| 7 | 7 months and more | 279 | 
                                                         
                                
                                11%
                                                             
                                                     |