| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 2576 | 
                                    
                                    70.1%
                                 | 
| 2 | 1 time | 583 | 
                                    
                                    15.9%
                                 | 
| 3 | 2 or 3 times | 302 | 
                                    
                                    8.2%
                                 | 
| 4 | 4 or 5 times | 81 | 
                                    
                                    2.2%
                                 | 
| 5 | 6 or 7 times | 41 | 
                                    
                                    1.1%
                                 | 
| 6 | 8 or 9 times | 20 | 
                                    
                                    0.5%
                                 | 
| 7 | 10 or 11 times | 18 | 
                                    
                                    0.5%
                                 | 
| 8 | 12 or more times | 55 | 
                                    
                                    1.5%
                                 | 
| Sysmiss | 28 |