| Value | Category | Cases | |
|---|---|---|---|
| 0 | No | 1218 | 
                                    
                                    90.2%
                                 | 
| 1 | Yes, spontaneously | 132 | 
                                    
                                    9.8%
                                 | 
| 2 | Yes, probed | 0 | 
                                    
                                    0%
                                 | 
| 8 | Not asked | 0 | 
                                    
                                    0%
                                 |