| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    9.4%
                                 | 
| 1 | 1 | 
                                    
                                    1.9%
                                 | |
| 3 | 1 | 
                                    
                                    1.9%
                                 | |
| 4 | 2 | 
                                    
                                    3.8%
                                 | |
| 5 | 6 | 
                                    
                                    11.3%
                                 | |
| 6 | 4 | 
                                    
                                    7.5%
                                 | |
| 7 | 2 | 
                                    
                                    3.8%
                                 | |
| 8 | 4 | 
                                    
                                    7.5%
                                 | |
| 10 | 3 | 
                                    
                                    5.7%
                                 | |
| 11 | 1 | 
                                    
                                    1.9%
                                 | |
| 12 | 2 | 
                                    
                                    3.8%
                                 | |
| 14 | 2 | 
                                    
                                    3.8%
                                 | |
| 15 | 3 | 
                                    
                                    5.7%
                                 | |
| 18 | 1 | 
                                    
                                    1.9%
                                 | |
| 19 | 1 | 
                                    
                                    1.9%
                                 | |
| 20 | 2 | 
                                    
                                    3.8%
                                 | |
| 22 | 1 | 
                                    
                                    1.9%
                                 | |
| 25 | 2 | 
                                    
                                    3.8%
                                 | |
| 30 | 2 | 
                                    
                                    3.8%
                                 | |
| 40 | 1 | 
                                    
                                    1.9%
                                 | |
| 42 | 1 | 
                                    
                                    1.9%
                                 | |
| 45 | 1 | 
                                    
                                    1.9%
                                 | |
| 50 | 1 | 
                                    
                                    1.9%
                                 | |
| 54 | 1 | 
                                    
                                    1.9%
                                 | |
| 67 | 1 | 
                                    
                                    1.9%
                                 | |
| 80 | 1 | 
                                    
                                    1.9%
                                 | |
| 97 | 1 | 
                                    
                                    1.9%
                                 | |
| Sysmiss | 162 |