| Value | Category | Cases | |
|---|---|---|---|
| 1 | None | 306065 | 
                                    
                                    63.9%
                                 | 
| 2 | One or two times | 124380 | 
                                    
                                    26%
                                 | 
| 3 | Three or four times | 29817 | 
                                    
                                    6.2%
                                 | 
| 4 | Five or more times | 18881 | 
                                    
                                    3.9%
                                 | 
| 7 | N/A | 3635 | |
| 8 | Invalid | 467 | |
| 9 | Missing | 2245 |