| Value | Category | Cases | |
|---|---|---|---|
| 1 | Never | 26 | 
                                                                 
                                    
                                    3.8%
                                 
                                                             | 
                                                        
                    
| 2 | Everytime we use them | 321 | 
                                                                 
                                    
                                    46.9%
                                 
                                                             | 
                                                        
                    
| 3 | At least once a week | 267 | 
                                                                 
                                    
                                    39%
                                 
                                                             | 
                                                        
                    
| 4 | At least once a month | 47 | 
                                                                 
                                    
                                    6.9%
                                 
                                                             | 
                                                        
                    
| 5 | At least once a year | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 6 | Don't remember | 23 | 
                                                                 
                                    
                                    3.4%
                                 
                                                             |