| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 12424 | 
                                    
                                    48.6%
                                 | 
| 2 | One | 7058 | 
                                    
                                    27.6%
                                 | 
| 3 | Two | 4611 | 
                                    
                                    18%
                                 | 
| 4 | Three or more | 1491 | 
                                    
                                    5.8%
                                 |