| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 0 | 113 | 
                                    
                                    67.3%
                                 | |
| 1 | 4 | 
                                    
                                    2.4%
                                 | |
| 2 | 12 | 
                                    
                                    7.1%
                                 | |
| 3 | 2 | 
                                    
                                    1.2%
                                 | |
| 4 | 6 | 
                                    
                                    3.6%
                                 | |
| 5 | 9 | 
                                    
                                    5.4%
                                 | |
| 6 | 5 | 
                                    
                                    3%
                                 | |
| 7 | 1 | 
                                    
                                    0.6%
                                 | |
| 8 | 2 | 
                                    
                                    1.2%
                                 | |
| 10 | 3 | 
                                    
                                    1.8%
                                 | |
| 13 | 1 | 
                                    
                                    0.6%
                                 | |
| 15 | 3 | 
                                    
                                    1.8%
                                 | |
| 21 | 1 | 
                                    
                                    0.6%
                                 | |
| 22 | 1 | 
                                    
                                    0.6%
                                 | |
| 45 | 1 | 
                                    
                                    0.6%
                                 | |
| 57 | 1 | 
                                    
                                    0.6%
                                 | |
| 70 | 1 | 
                                    
                                    0.6%
                                 | |
| 150 | 1 | 
                                    
                                    0.6%
                                 | |
| 240 | 1 | 
                                    
                                    0.6%
                                 | |
| Sysmiss | 74 |