| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 4 | 
                                    
                                    1.9%
                                 | 
| 0 | 2 | 
                                    
                                    1%
                                 | |
| 4 | 2 | 
                                    
                                    1%
                                 | |
| 10 | 1 | 
                                    
                                    0.5%
                                 | |
| 15 | 2 | 
                                    
                                    1%
                                 | |
| 20 | 3 | 
                                    
                                    1.5%
                                 | |
| 21 | 1 | 
                                    
                                    0.5%
                                 | |
| 22 | 1 | 
                                    
                                    0.5%
                                 | |
| 23 | 1 | 
                                    
                                    0.5%
                                 | |
| 25 | 2 | 
                                    
                                    1%
                                 | |
| 30 | 6 | 
                                    
                                    2.9%
                                 | |
| 32 | 2 | 
                                    
                                    1%
                                 | |
| 35 | 2 | 
                                    
                                    1%
                                 | |
| 36 | 1 | 
                                    
                                    0.5%
                                 | |
| 37 | 1 | 
                                    
                                    0.5%
                                 | |
| 38 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 5 | 
                                    
                                    2.4%
                                 | |
| 42 | 1 | 
                                    
                                    0.5%
                                 | |
| 44 | 1 | 
                                    
                                    0.5%
                                 | |
| 47 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 10 | 
                                    
                                    4.9%
                                 | |
| 54 | 1 | 
                                    
                                    0.5%
                                 | |
| 55 | 2 | 
                                    
                                    1%
                                 | |
| 56 | 1 | 
                                    
                                    0.5%
                                 | |
| 60 | 8 | 
                                    
                                    3.9%
                                 | |
| 63 | 1 | 
                                    
                                    0.5%
                                 | |
| 64 | 1 | 
                                    
                                    0.5%
                                 | |
| 65 | 1 | 
                                    
                                    0.5%
                                 | |
| 69 | 1 | 
                                    
                                    0.5%
                                 | |
| 70 | 8 | 
                                    
                                    3.9%
                                 | |
| 71 | 1 | 
                                    
                                    0.5%
                                 | |
| 73 | 1 | 
                                    
                                    0.5%
                                 | |
| 75 | 4 | 
                                    
                                    1.9%
                                 | |
| 78 | 1 | 
                                    
                                    0.5%
                                 | |
| 80 | 17 | 
                                    
                                    8.3%
                                 | |
| 83 | 1 | 
                                    
                                    0.5%
                                 | |
| 85 | 2 | 
                                    
                                    1%
                                 | |
| 87 | 1 | 
                                    
                                    0.5%
                                 | |
| 90 | 10 | 
                                    
                                    4.9%
                                 | |
| 92 | 2 | 
                                    
                                    1%
                                 | |
| 95 | 7 | 
                                    
                                    3.4%
                                 | |
| 99 | 2 | 
                                    
                                    1%
                                 | |
| 100 | 83 | 
                                    
                                    40.3%
                                 | |
| Sysmiss | 196 |