| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 | 
                                    
                                    0.8%
                                 | 
| 0 | 42 | 
                                    
                                    31.6%
                                 | |
| 1 | 12 | 
                                    
                                    9%
                                 | |
| 2 | 8 | 
                                    
                                    6%
                                 | |
| 3 | 7 | 
                                    
                                    5.3%
                                 | |
| 4 | 8 | 
                                    
                                    6%
                                 | |
| 5 | 5 | 
                                    
                                    3.8%
                                 | |
| 6 | 7 | 
                                    
                                    5.3%
                                 | |
| 7 | 3 | 
                                    
                                    2.3%
                                 | |
| 8 | 4 | 
                                    
                                    3%
                                 | |
| 9 | 2 | 
                                    
                                    1.5%
                                 | |
| 10 | 2 | 
                                    
                                    1.5%
                                 | |
| 11 | 2 | 
                                    
                                    1.5%
                                 | |
| 13 | 1 | 
                                    
                                    0.8%
                                 | |
| 14 | 1 | 
                                    
                                    0.8%
                                 | |
| 17 | 2 | 
                                    
                                    1.5%
                                 | |
| 18 | 1 | 
                                    
                                    0.8%
                                 | |
| 20 | 2 | 
                                    
                                    1.5%
                                 | |
| 21 | 2 | 
                                    
                                    1.5%
                                 | |
| 22 | 1 | 
                                    
                                    0.8%
                                 | |
| 24 | 1 | 
                                    
                                    0.8%
                                 | |
| 25 | 3 | 
                                    
                                    2.3%
                                 | |
| 27 | 2 | 
                                    
                                    1.5%
                                 | |
| 30 | 3 | 
                                    
                                    2.3%
                                 | |
| 31 | 1 | 
                                    
                                    0.8%
                                 | |
| 38 | 1 | 
                                    
                                    0.8%
                                 | |
| 40 | 2 | 
                                    
                                    1.5%
                                 | |
| 55 | 1 | 
                                    
                                    0.8%
                                 | |
| 56 | 1 | 
                                    
                                    0.8%
                                 | |
| 65 | 1 | 
                                    
                                    0.8%
                                 | |
| 118 | 1 | 
                                    
                                    0.8%
                                 | |
| 140 | 1 | 
                                    
                                    0.8%
                                 | |
| 331 | 1 | 
                                    
                                    0.8%
                                 | |
| 1484 | 1 | 
                                    
                                    0.8%
                                 | |
| Sysmiss | 178 |