| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 39534 | 
                                    
                                    24.6%
                                 | 
| 2 | No, never | 120999 | 
                                    
                                    75.4%
                                 | 
| 7 | N/A | 320074 | |
| 8 | Invalid | 111 | |
| 9 | Missing | 4772 |