| Value | Category | Cases | |
|---|---|---|---|
| 0 | 64 | 
                                
                                28.4%
                             | |
| 1 | 144 | 
                                
                                64%
                             | |
| 2 | 9 | 
                                
                                4%
                             | |
| 3 | 6 | 
                                
                                2.7%
                             | |
| 4 | 1 | 
                                
                                0.4%
                             | |
| 6 | 1 | 
                                
                                0.4%
                             | |
| 99 | Not applicable | 0 | 
                                
                                0%
                             | 
| Sysmiss | 25 |