| Value | Category | Cases | |
|---|---|---|---|
| -999 | 104 | 
                                    
                                    9.4%
                                 | |
| -888 | 34 | 
                                    
                                    3.1%
                                 | |
| 0 | 624 | 
                                    
                                    56.6%
                                 | |
| 1 | 4 | 
                                    
                                    0.4%
                                 | |
| 2 | 36 | 
                                    
                                    3.3%
                                 | |
| 3 | 35 | 
                                    
                                    3.2%
                                 | |
| 4 | 51 | 
                                    
                                    4.6%
                                 | |
| 5 | 40 | 
                                    
                                    3.6%
                                 | |
| 6 | 42 | 
                                    
                                    3.8%
                                 | |
| 7 | 133 | 
                                    
                                    12.1%
                                 | |
| Sysmiss | 4097 |