| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 3 | 2 | 
                                    
                                    1.8%
                                 | |
| 4 | 1 | 
                                    
                                    0.9%
                                 | |
| 5 | 23 | 
                                    
                                    20.7%
                                 | |
| 6 | 12 | 
                                    
                                    10.8%
                                 | |
| 7 | 6 | 
                                    
                                    5.4%
                                 | |
| 8 | 5 | 
                                    
                                    4.5%
                                 | |
| 9 | 1 | 
                                    
                                    0.9%
                                 | |
| 10 | 4 | 
                                    
                                    3.6%
                                 | |
| 11 | 3 | 
                                    
                                    2.7%
                                 | |
| 12 | 2 | 
                                    
                                    1.8%
                                 | |
| 13 | 2 | 
                                    
                                    1.8%
                                 | |
| 14 | 1 | 
                                    
                                    0.9%
                                 | |
| 15 | 3 | 
                                    
                                    2.7%
                                 | |
| 16 | 1 | 
                                    
                                    0.9%
                                 | |
| 17 | 4 | 
                                    
                                    3.6%
                                 | |
| 18 | 4 | 
                                    
                                    3.6%
                                 | |
| 19 | 2 | 
                                    
                                    1.8%
                                 | |
| 21 | 2 | 
                                    
                                    1.8%
                                 | |
| 22 | 4 | 
                                    
                                    3.6%
                                 | |
| 23 | 2 | 
                                    
                                    1.8%
                                 | |
| 24 | 1 | 
                                    
                                    0.9%
                                 | |
| 27 | 2 | 
                                    
                                    1.8%
                                 | |
| 28 | 1 | 
                                    
                                    0.9%
                                 | |
| 30 | 2 | 
                                    
                                    1.8%
                                 | |
| 32 | 3 | 
                                    
                                    2.7%
                                 | |
| 34 | 1 | 
                                    
                                    0.9%
                                 | |
| 35 | 2 | 
                                    
                                    1.8%
                                 | |
| 36 | 2 | 
                                    
                                    1.8%
                                 | |
| 37 | 1 | 
                                    
                                    0.9%
                                 | |
| 42 | 1 | 
                                    
                                    0.9%
                                 | |
| 45 | 2 | 
                                    
                                    1.8%
                                 | |
| 48 | 1 | 
                                    
                                    0.9%
                                 | |
| 50 | 1 | 
                                    
                                    0.9%
                                 | |
| 51 | 1 | 
                                    
                                    0.9%
                                 | |
| 52 | 1 | 
                                    
                                    0.9%
                                 | |
| 69 | 1 | 
                                    
                                    0.9%
                                 | |
| 75 | 1 | 
                                    
                                    0.9%
                                 | |
| 95 | 1 | 
                                    
                                    0.9%
                                 | |
| 110 | 1 | 
                                    
                                    0.9%
                                 | |
| 140 | 1 | 
                                    
                                    0.9%
                                 |