| Value | Category | Cases | |
|---|---|---|---|
| 0 | No response | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| ? | 2 | 
                                                                 
                                    
                                    15.4%
                                 
                                                             | 
                                                        
                    |
| L | Periodic abstinence / rhythm | 11 | 
                                                                 
                                    
                                    84.6%
                                 
                                                             |