| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 0 | 
                                    
                                    0%
                                 | 
| 1 | 1 | 
                                    
                                    0.5%
                                 | |
| 2 | 2 | 
                                    
                                    0.9%
                                 | |
| 3 | 1 | 
                                    
                                    0.5%
                                 | |
| 4 | 3 | 
                                    
                                    1.4%
                                 | |
| 5 | 30 | 
                                    
                                    14%
                                 | |
| 6 | 15 | 
                                    
                                    7%
                                 | |
| 7 | 16 | 
                                    
                                    7.4%
                                 | |
| 8 | 13 | 
                                    
                                    6%
                                 | |
| 9 | 5 | 
                                    
                                    2.3%
                                 | |
| 10 | 11 | 
                                    
                                    5.1%
                                 | |
| 11 | 7 | 
                                    
                                    3.3%
                                 | |
| 12 | 9 | 
                                    
                                    4.2%
                                 | |
| 13 | 2 | 
                                    
                                    0.9%
                                 | |
| 14 | 4 | 
                                    
                                    1.9%
                                 | |
| 15 | 12 | 
                                    
                                    5.6%
                                 | |
| 16 | 3 | 
                                    
                                    1.4%
                                 | |
| 17 | 3 | 
                                    
                                    1.4%
                                 | |
| 18 | 3 | 
                                    
                                    1.4%
                                 | |
| 20 | 9 | 
                                    
                                    4.2%
                                 | |
| 21 | 5 | 
                                    
                                    2.3%
                                 | |
| 22 | 2 | 
                                    
                                    0.9%
                                 | |
| 25 | 2 | 
                                    
                                    0.9%
                                 | |
| 26 | 3 | 
                                    
                                    1.4%
                                 | |
| 27 | 2 | 
                                    
                                    0.9%
                                 | |
| 30 | 6 | 
                                    
                                    2.8%
                                 | |
| 35 | 1 | 
                                    
                                    0.5%
                                 | |
| 38 | 1 | 
                                    
                                    0.5%
                                 | |
| 40 | 1 | 
                                    
                                    0.5%
                                 | |
| 43 | 1 | 
                                    
                                    0.5%
                                 | |
| 44 | 1 | 
                                    
                                    0.5%
                                 | |
| 45 | 2 | 
                                    
                                    0.9%
                                 | |
| 46 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 3 | 
                                    
                                    1.4%
                                 | |
| 51 | 1 | 
                                    
                                    0.5%
                                 | |
| 55 | 1 | 
                                    
                                    0.5%
                                 | |
| 56 | 2 | 
                                    
                                    0.9%
                                 | |
| 60 | 4 | 
                                    
                                    1.9%
                                 | |
| 61 | 1 | 
                                    
                                    0.5%
                                 | |
| 62 | 2 | 
                                    
                                    0.9%
                                 | |
| 65 | 1 | 
                                    
                                    0.5%
                                 | |
| 69 | 1 | 
                                    
                                    0.5%
                                 | |
| 75 | 1 | 
                                    
                                    0.5%
                                 | |
| 78 | 1 | 
                                    
                                    0.5%
                                 | |
| 80 | 4 | 
                                    
                                    1.9%
                                 | |
| 92 | 1 | 
                                    
                                    0.5%
                                 | |
| 115 | 1 | 
                                    
                                    0.5%
                                 | |
| 120 | 1 | 
                                    
                                    0.5%
                                 | |
| 155 | 1 | 
                                    
                                    0.5%
                                 | |
| 161 | 1 | 
                                    
                                    0.5%
                                 | |
| 167 | 1 | 
                                    
                                    0.5%
                                 | |
| 180 | 1 | 
                                    
                                    0.5%
                                 | |
| 197 | 1 | 
                                    
                                    0.5%
                                 | |
| 200 | 2 | 
                                    
                                    0.9%
                                 | |
| 210 | 1 | 
                                    
                                    0.5%
                                 | |
| 280 | 1 | 
                                    
                                    0.5%
                                 | |
| 330 | 1 | 
                                    
                                    0.5%
                                 | |
| 400 | 1 | 
                                    
                                    0.5%
                                 | |
| 820 | 1 | 
                                    
                                    0.5%
                                 | |
| 3200 | 1 | 
                                    
                                    0.5%
                                 |