| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 62943 | 
                                    
                                    47.5%
                                 | 
| 2 | No, never | 69596 | 
                                    
                                    52.5%
                                 | 
| 7 | N/A | 348433 | |
| 8 | Invalid | 109 | |
| 9 | Missing | 4409 |