| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 | 
                                    
                                    0%
                                 | 
| 0 | No | 2352 | 
                                    
                                    98%
                                 | 
| 1 | Yes | 48 | 
                                    
                                    2%
                                 | 
| 9 | Don't know | 0 | 
                                    
                                    0%
                                 |