| Value | Category | Cases | |
|---|---|---|---|
| 0 | 538 | 
                                    
                                    51.5%
                                 | |
| 1 | 337 | 
                                    
                                    32.2%
                                 | |
| 2 | 110 | 
                                    
                                    10.5%
                                 | |
| 3 | 37 | 
                                    
                                    3.5%
                                 | |
| 4 | 14 | 
                                    
                                    1.3%
                                 | |
| 5 | 7 | 
                                    
                                    0.7%
                                 | |
| 8 | 1 | 
                                    
                                    0.1%
                                 | |
| 12 | 1 | 
                                    
                                    0.1%
                                 | |
| Sysmiss | 4 |