| Value | Category | Cases | |
|---|---|---|---|
| 1 | 0 times | 2333 | 
                                    
                                    96.9%
                                 | 
| 2 | 1 or 2 times | 29 | 
                                    
                                    1.2%
                                 | 
| 3 | 3 to 9 times | 22 | 
                                    
                                    0.9%
                                 | 
| 4 | 10 to 19 times | 16 | 
                                    
                                    0.7%
                                 | 
| 5 | 20 or more times | 8 | 
                                    
                                    0.3%
                                 | 
| Sysmiss | 171 |