| Value | Category | Cases | |
|---|---|---|---|
| 1 | then | 3995 | 
                                    
                                    63.5%
                                 | 
| 2 | later | 629 | 
                                    
                                    10%
                                 | 
| 3 | not at all | 1664 | 
                                    
                                    26.5%
                                 | 
| Sysmiss | 9063 |