| Value | Category | Cases | |
|---|---|---|---|
| 1 | No, never | 141196 | 
                                    
                                    90.5%
                                 | 
| 2 | Yes, once | 11740 | 
                                    
                                    7.5%
                                 | 
| 3 | Yes, twice or more | 3107 | 
                                    
                                    2%
                                 | 
| 7 | N/A | 324950 | |
| 8 | Invalid | 338 | |
| 9 | Missing | 4159 |