| Value | Category | Cases | |
|---|---|---|---|
| 0 | 67 | 
                                    
                                    3.7%
                                 | |
| 1 | 100 | 
                                    
                                    5.5%
                                 | |
| 2 | 265 | 
                                    
                                    14.6%
                                 | |
| 3 | 357 | 
                                    
                                    19.6%
                                 | |
| 4 | 1006 | 
                                    
                                    55.2%
                                 | |
| 999 | 26 | 
                                    
                                    1.4%
                                 | |
| Sysmiss | 1 |