| Value | Category | Cases | |
|---|---|---|---|
| 1 | Currently using | 794 | 
                                    
                                    58.3%
                                 | 
| 3 | Ever used | 264 | 
                                    
                                    19.4%
                                 | 
| 4 | Never used | 304 | 
                                    
                                    22.3%
                                 |