| Value | Category | Cases | |
|---|---|---|---|
| 1 | Yes | 70096 | 
                                    
                                    42.4%
                                 | 
| 2 | No, never | 95068 | 
                                    
                                    57.6%
                                 | 
| 7 | N/A | 315076 | |
| 8 | Invalid | 174 | |
| 9 | Missing | 5076 |