| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 14 | 
                                    
                                    6.5%
                                 | 
| 0 | 20 | 
                                    
                                    9.3%
                                 | |
| 1 | 23 | 
                                    
                                    10.7%
                                 | |
| 2 | 34 | 
                                    
                                    15.8%
                                 | |
| 3 | 28 | 
                                    
                                    13%
                                 | |
| 4 | 13 | 
                                    
                                    6%
                                 | |
| 5 | 17 | 
                                    
                                    7.9%
                                 | |
| 6 | 10 | 
                                    
                                    4.7%
                                 | |
| 7 | 7 | 
                                    
                                    3.3%
                                 | |
| 8 | 7 | 
                                    
                                    3.3%
                                 | |
| 9 | 4 | 
                                    
                                    1.9%
                                 | |
| 10 | 7 | 
                                    
                                    3.3%
                                 | |
| 11 | 1 | 
                                    
                                    0.5%
                                 | |
| 12 | 1 | 
                                    
                                    0.5%
                                 | |
| 13 | 1 | 
                                    
                                    0.5%
                                 | |
| 15 | 5 | 
                                    
                                    2.3%
                                 | |
| 16 | 3 | 
                                    
                                    1.4%
                                 | |
| 17 | 1 | 
                                    
                                    0.5%
                                 | |
| 20 | 4 | 
                                    
                                    1.9%
                                 | |
| 27 | 1 | 
                                    
                                    0.5%
                                 | |
| 30 | 2 | 
                                    
                                    0.9%
                                 | |
| 32 | 1 | 
                                    
                                    0.5%
                                 | |
| 45 | 1 | 
                                    
                                    0.5%
                                 | |
| 50 | 1 | 
                                    
                                    0.5%
                                 | |
| 52 | 1 | 
                                    
                                    0.5%
                                 | |
| 60 | 1 | 
                                    
                                    0.5%
                                 | |
| 75 | 1 | 
                                    
                                    0.5%
                                 | |
| 80 | 1 | 
                                    
                                    0.5%
                                 | |
| 110 | 1 | 
                                    
                                    0.5%
                                 | |
| 140 | 1 | 
                                    
                                    0.5%
                                 | |
| 198 | 1 | 
                                    
                                    0.5%
                                 | |
| 470 | 1 | 
                                    
                                    0.5%
                                 | |
| 1500 | 1 | 
                                    
                                    0.5%
                                 |