| Value | Category | Cases | |
|---|---|---|---|
| 1 | days after delivery | 2445 | 
                                    
                                    95.8%
                                 | 
| 2 | weeks after delivery | 100 | 
                                    
                                    3.9%
                                 | 
| 9 | special answers | 6 | 
                                    
                                    0.2%
                                 | 
| Sysmiss | 12800 |