| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 6 | 
                                    
                                    0%
                                 | 
| 0 | None | 16746 | 
                                    
                                    65.9%
                                 | 
| 1 | Few | 6347 | 
                                    
                                    25%
                                 | 
| 2 | Some | 1770 | 
                                    
                                    7%
                                 | 
| 3 | Most | 475 | 
                                    
                                    1.9%
                                 | 
| 4 | All | 53 | 
                                    
                                    0.2%
                                 |