| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | None | 48 | 
                                    
                                    45.7%
                                 | 
| 1 | 3 | 
                                    
                                    2.9%
                                 | |
| 2 | 10 | 
                                    
                                    9.5%
                                 | |
| 3 | 11 | 
                                    
                                    10.5%
                                 | |
| 4 | 3 | 
                                    
                                    2.9%
                                 | |
| 5 | 9 | 
                                    
                                    8.6%
                                 | |
| 6 | 2 | 
                                    
                                    1.9%
                                 | |
| 9 | 2 | 
                                    
                                    1.9%
                                 | |
| 10 | 8 | 
                                    
                                    7.6%
                                 | |
| 15 | 4 | 
                                    
                                    3.8%
                                 | |
| 20 | 1 | 
                                    
                                    1%
                                 | |
| 22 | 1 | 
                                    
                                    1%
                                 | |
| 60 | 1 | 
                                    
                                    1%
                                 | |
| 90 | 1 | 
                                    
                                    1%
                                 | |
| 100 | 1 | 
                                    
                                    1%
                                 | |
| Sysmiss | 145 |