| Value | Category | Cases | |
|---|---|---|---|
| 0 | 285 | 
                                    
                                    73.5%
                                 | |
| 1 | 70 | 
                                    
                                    18%
                                 | |
| 2 | 13 | 
                                    
                                    3.4%
                                 | |
| 3 | 4 | 
                                    
                                    1%
                                 | |
| 4 | 2 | 
                                    
                                    0.5%
                                 | |
| 5 | 3 | 
                                    
                                    0.8%
                                 | |
| 6 | 1 | 
                                    
                                    0.3%
                                 | |
| 8 | 2 | 
                                    
                                    0.5%
                                 | |
| 9 | 2 | 
                                    
                                    0.5%
                                 | |
| 10 | 2 | 
                                    
                                    0.5%
                                 | |
| 12 | 3 | 
                                    
                                    0.8%
                                 | |
| 13 | 1 | 
                                    
                                    0.3%
                                 | |
| Sysmiss | 12 |