| Value | Category | Cases | |
|---|---|---|---|
| 1 | Then | 158 | 
                                                         
                                
                                89.3%
                                                             
                                                     | 
                                            
| 2 | Later | 15 | 
                                                         
                                
                                8.5%
                                                             
                                                     | 
                                            
| 3 | Not at all | 4 | 
                                                         
                                
                                2.3%
                                                             
                                                     | 
                                            
| Sysmiss | 5939 |