| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 1126 | 
                                    
                                    89.1%
                                 | 
| 2 | 1 or 2 times | 83 | 
                                    
                                    6.6%
                                 | 
| 3 | 3 to 9 times | 38 | 
                                    
                                    3%
                                 | 
| 4 | 10 or more times | 17 | 
                                    
                                    1.3%
                                 | 
| Sysmiss | 93 |