| Value | Category | Cases | |
|---|---|---|---|
| 1 | during her period | 751 | 
                                    
                                    5%
                                 | 
| 2 | after period ended | 5806 | 
                                    
                                    38.9%
                                 | 
| 3 | middle of the cycle | 1647 | 
                                    
                                    11%
                                 | 
| 4 | before period begins | 1310 | 
                                    
                                    8.8%
                                 | 
| 5 | at any time | 2398 | 
                                    
                                    16.1%
                                 | 
| 6 | other | 43 | 
                                    
                                    0.3%
                                 | 
| 8 | don't know | 2961 | 
                                    
                                    19.9%
                                 | 
| Sysmiss | 30 |