| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 282 | 
                                    
                                    95.6%
                                 | 
| 2 | One | 6 | 
                                    
                                    2%
                                 | 
| 3 | Two | 2 | 
                                    
                                    0.7%
                                 | 
| 4 | Three | 3 | 
                                    
                                    1%
                                 | 
| 5 | More than three | 2 | 
                                    
                                    0.7%
                                 | 
| Sysmiss | 81 |