| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 19809 | 
                                    
                                    77.4%
                                 | 
| 2 | One | 5009 | 
                                    
                                    19.6%
                                 | 
| 3 | Two | 641 | 
                                    
                                    2.5%
                                 | 
| 4 | Three or more | 125 | 
                                    
                                    0.5%
                                 |