| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -8 | Refused | 0 | 
                                    
                                    0%
                                 | 
| 1 | 1 | 
                                    
                                    10%
                                 | |
| 5 | 2 | 
                                    
                                    20%
                                 | |
| 10 | 2 | 
                                    
                                    20%
                                 | |
| 15 | 2 | 
                                    
                                    20%
                                 | |
| 25 | 1 | 
                                    
                                    10%
                                 | |
| 30 | 1 | 
                                    
                                    10%
                                 | |
| 100 | 1 | 
                                    
                                    10%
                                 | |
| Sysmiss | 945 |