| Value | Category | Cases | |
|---|---|---|---|
| 1 | A week or less | 1 | 
                                    
                                    0.1%
                                 | 
| 2 | More than a week, less than a month | 1 | 
                                    
                                    0.1%
                                 | 
| 3 | More than one month, less than 3 months | 2 | 
                                    
                                    0.2%
                                 | 
| 4 | More than 3 months | 823 | 
                                    
                                    99.5%
                                 |