| Value | Category | Cases | |
|---|---|---|---|
| -99 | Don't know | 0 | 
                                    
                                    0%
                                 | 
| -9 | Don't know (spontaneous) | 4 | 
                                    
                                    2.6%
                                 | 
| 0 | 101 | 
                                    
                                    66%
                                 | |
| 3 | 4 | 
                                    
                                    2.6%
                                 | |
| 4 | 5 | 
                                    
                                    3.3%
                                 | |
| 5 | 5 | 
                                    
                                    3.3%
                                 | |
| 6 | 1 | 
                                    
                                    0.7%
                                 | |
| 7 | 2 | 
                                    
                                    1.3%
                                 | |
| 8 | 6 | 
                                    
                                    3.9%
                                 | |
| 9 | 3 | 
                                    
                                    2%
                                 | |
| 11 | 1 | 
                                    
                                    0.7%
                                 | |
| 12 | 3 | 
                                    
                                    2%
                                 | |
| 17 | 1 | 
                                    
                                    0.7%
                                 | |
| 19 | 1 | 
                                    
                                    0.7%
                                 | |
| 20 | 1 | 
                                    
                                    0.7%
                                 | |
| 25 | 1 | 
                                    
                                    0.7%
                                 | |
| 29 | 1 | 
                                    
                                    0.7%
                                 | |
| 30 | 2 | 
                                    
                                    1.3%
                                 | |
| 35 | 1 | 
                                    
                                    0.7%
                                 | |
| 40 | 2 | 
                                    
                                    1.3%
                                 | |
| 45 | 1 | 
                                    
                                    0.7%
                                 | |
| 60 | 1 | 
                                    
                                    0.7%
                                 | |
| 62 | 1 | 
                                    
                                    0.7%
                                 | |
| 69 | 1 | 
                                    
                                    0.7%
                                 | |
| 152 | 1 | 
                                    
                                    0.7%
                                 | |
| 233 | 1 | 
                                    
                                    0.7%
                                 | |
| 275 | 1 | 
                                    
                                    0.7%
                                 | |
| 4100 | 1 | 
                                    
                                    0.7%
                                 | |
| Sysmiss | 192 |