| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 1140 | 
                                    
                                    85.9%
                                 | 
| 2 | 1 time | 106 | 
                                    
                                    8%
                                 | 
| 3 | 2 or 3 times | 46 | 
                                    
                                    3.5%
                                 | 
| 4 | 4 or 5 times | 22 | 
                                    
                                    1.7%
                                 | 
| 5 | 6 or more times | 13 | 
                                    
                                    1%
                                 | 
| Sysmiss | 30 |