| Value | Category | Cases | |
|---|---|---|---|
| 0 | 351 | 
                                    
                                    86%
                                 | |
| 1 | 14 | 
                                    
                                    3.4%
                                 | |
| 2 | 14 | 
                                    
                                    3.4%
                                 | |
| 3 | 15 | 
                                    
                                    3.7%
                                 | |
| 4 | 3 | 
                                    
                                    0.7%
                                 | |
| 5 | 2 | 
                                    
                                    0.5%
                                 | |
| 6 | 2 | 
                                    
                                    0.5%
                                 | |
| 8 | 1 | 
                                    
                                    0.2%
                                 | |
| 10 | 1 | 
                                    
                                    0.2%
                                 | |
| 15 | 2 | 
                                    
                                    0.5%
                                 | |
| 20 | 2 | 
                                    
                                    0.5%
                                 | |
| 25 | 1 | 
                                    
                                    0.2%
                                 | |
| Sysmiss | 1992 |