| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 1 | 
                                    
                                    2.2%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 0 | 2 | 
                                    
                                    4.4%
                                 | |
| 1 | 23 | 
                                    
                                    51.1%
                                 | |
| 2 | 3 | 
                                    
                                    6.7%
                                 | |
| 3 | 7 | 
                                    
                                    15.6%
                                 | |
| 5 | 3 | 
                                    
                                    6.7%
                                 | |
| 8 | 1 | 
                                    
                                    2.2%
                                 | |
| 10 | 3 | 
                                    
                                    6.7%
                                 | |
| 15 | 1 | 
                                    
                                    2.2%
                                 | |
| 70 | 1 | 
                                    
                                    2.2%
                                 | |
| Sysmiss | 910 |