| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 633 | 
                                    
                                    46.5%
                                 | 
| 1 | Yes, spontaneously | 104 | 
                                    
                                    7.6%
                                 | 
| 2 | Yes, probed | 625 | 
                                    
                                    45.9%
                                 | 
| 8 | Not asked | 0 | 
                                    
                                    0%
                                 |