| Value | Category | Cases | |
|---|---|---|---|
| 1 | day | 0 | 
                                    
                                    0%
                                 | 
| 2 | week | 2 | 
                                    
                                    6.5%
                                 | 
| 3 | month | 24 | 
                                    
                                    77.4%
                                 | 
| 4 | year | 5 | 
                                    
                                    16.1%
                                 | 
| Sysmiss | 962 |