| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    4.2%
                                 | 
| 1 | 3 | 
                                    
                                    6.3%
                                 | |
| 3 | 2 | 
                                    
                                    4.2%
                                 | |
| 4 | 1 | 
                                    
                                    2.1%
                                 | |
| 5 | 8 | 
                                    
                                    16.7%
                                 | |
| 8 | 1 | 
                                    
                                    2.1%
                                 | |
| 10 | 5 | 
                                    
                                    10.4%
                                 | |
| 15 | 4 | 
                                    
                                    8.3%
                                 | |
| 20 | 5 | 
                                    
                                    10.4%
                                 | |
| 25 | 2 | 
                                    
                                    4.2%
                                 | |
| 30 | 4 | 
                                    
                                    8.3%
                                 | |
| 33 | 1 | 
                                    
                                    2.1%
                                 | |
| 35 | 1 | 
                                    
                                    2.1%
                                 | |
| 40 | 3 | 
                                    
                                    6.3%
                                 | |
| 45 | 1 | 
                                    
                                    2.1%
                                 | |
| 50 | 3 | 
                                    
                                    6.3%
                                 | |
| 80 | 1 | 
                                    
                                    2.1%
                                 | |
| 100 | 1 | 
                                    
                                    2.1%
                                 | |
| Sysmiss | 297 |