| Value | Category | Cases | |
|---|---|---|---|
| 0 | received no inject. | 1274 | 
                                                                 
                                    
                                    19.8%
                                 
                                                             | 
                                                        
                    
| 1 | 1249 | 
                                                                 
                                    
                                    19.4%
                                 
                                                             | 
                                                        
                    |
| 2 | 2300 | 
                                                                 
                                    
                                    35.7%
                                 
                                                             | 
                                                        
                    |
| 3 | 1282 | 
                                                                 
                                    
                                    19.9%
                                 
                                                             | 
                                                        
                    |
| 4 | 106 | 
                                                                 
                                    
                                    1.6%
                                 
                                                             | 
                                                        
                    |
| 5 | 162 | 
                                                                 
                                    
                                    2.5%
                                 
                                                             | 
                                                        
                    |
| 6 | 1 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    |
| 7 | 7+ | 2 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 8 | don't know | 67 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    
| 9 | 5 | 
                                                                 
                                    
                                    0.1%
                                 
                                                             | 
                                                        
                    |
| 11 | .Z | 12306 |