| Value | Category | Cases | |
|---|---|---|---|
| 1 | Own blade/razor | 65 | 
                                    
                                    63.1%
                                 | 
| 2 | Shared blade/razor | 12 | 
                                    
                                    11.7%
                                 | 
| 3 | Scalpel | 9 | 
                                    
                                    8.7%
                                 | 
| 4 | Knife | 8 | 
                                    
                                    7.8%
                                 | 
| 6 | Other | 2 | 
                                    
                                    1.9%
                                 | 
| 8 | Don't know | 7 | 
                                    
                                    6.8%
                                 |