| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                    
                                    0.2%
                                 | 
| 0 | 818 | 
                                    
                                    85.7%
                                 | |
| 1 | 16 | 
                                    
                                    1.7%
                                 | |
| 2 | 6 | 
                                    
                                    0.6%
                                 | |
| 3 | 9 | 
                                    
                                    0.9%
                                 | |
| 4 | 2 | 
                                    
                                    0.2%
                                 | |
| 5 | 11 | 
                                    
                                    1.2%
                                 | |
| 7 | 1 | 
                                    
                                    0.1%
                                 | |
| 10 | 17 | 
                                    
                                    1.8%
                                 | |
| 11 | 1 | 
                                    
                                    0.1%
                                 | |
| 15 | 10 | 
                                    
                                    1%
                                 | |
| 17 | 1 | 
                                    
                                    0.1%
                                 | |
| 19 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 13 | 
                                    
                                    1.4%
                                 | |
| 21 | 1 | 
                                    
                                    0.1%
                                 | |
| 22 | 2 | 
                                    
                                    0.2%
                                 | |
| 25 | 3 | 
                                    
                                    0.3%
                                 | |
| 30 | 12 | 
                                    
                                    1.3%
                                 | |
| 40 | 6 | 
                                    
                                    0.6%
                                 | |
| 45 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 3 | 
                                    
                                    0.3%
                                 | |
| 55 | 1 | 
                                    
                                    0.1%
                                 | |
| 60 | 2 | 
                                    
                                    0.2%
                                 | |
| 66 | 1 | 
                                    
                                    0.1%
                                 | |
| 70 | 3 | 
                                    
                                    0.3%
                                 | |
| 72 | 1 | 
                                    
                                    0.1%
                                 | |
| 75 | 1 | 
                                    
                                    0.1%
                                 | |
| 80 | 2 | 
                                    
                                    0.2%
                                 | |
| 85 | 1 | 
                                    
                                    0.1%
                                 | |
| 90 | 2 | 
                                    
                                    0.2%
                                 | |
| 95 | 1 | 
                                    
                                    0.1%
                                 | |
| 98 | 1 | 
                                    
                                    0.1%
                                 | |
| 100 | 3 | 
                                    
                                    0.3%
                                 |