| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 378576 | 
                                    
                                    79%
                                 | 
| 2 | One or two times | 81343 | 
                                    
                                    17%
                                 | 
| 3 | Three or four times | 12216 | 
                                    
                                    2.5%
                                 | 
| 4 | Five or more times | 7134 | 
                                    
                                    1.5%
                                 | 
| 7 | N/A | 3627 | |
| 8 | Invalid | 381 | |
| 9 | Missing | 2213 |