| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 2 | 
                                    
                                    4.8%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 1 | 13 | 
                                    
                                    31%
                                 | |
| 2 | 5 | 
                                    
                                    11.9%
                                 | |
| 3 | 3 | 
                                    
                                    7.1%
                                 | |
| 5 | 6 | 
                                    
                                    14.3%
                                 | |
| 7 | 2 | 
                                    
                                    4.8%
                                 | |
| 8 | 1 | 
                                    
                                    2.4%
                                 | |
| 10 | 4 | 
                                    
                                    9.5%
                                 | |
| 15 | 4 | 
                                    
                                    9.5%
                                 | |
| 20 | 2 | 
                                    
                                    4.8%
                                 | |
| Sysmiss | 913 |