| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 385998 | 
                                    
                                    80.6%
                                 | 
| 2 | One or two times | 75969 | 
                                    
                                    15.9%
                                 | 
| 3 | Three or four times | 10882 | 
                                    
                                    2.3%
                                 | 
| 4 | Five or more times | 6282 | 
                                    
                                    1.3%
                                 | 
| 7 | N/A | 3625 | |
| 8 | Invalid | 451 | |
| 9 | Missing | 2283 |