| Value | Category | Cases | |
|---|---|---|---|
| 0 | Knows no method | 26 | 
                                    
                                    1.9%
                                 | 
| 1 | Knows only folkloric | 4 | 
                                    
                                    0.3%
                                 | 
| 2 | Knows only trad. mth | 5 | 
                                    
                                    0.4%
                                 | 
| 3 | Knows modern method | 1327 | 
                                    
                                    97.4%
                                 |