| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 5 | 
                                    
                                    0.5%
                                 | 
| 0 | 630 | 
                                    
                                    61.5%
                                 | |
| 1 | 37 | 
                                    
                                    3.6%
                                 | |
| 2 | 36 | 
                                    
                                    3.5%
                                 | |
| 3 | 29 | 
                                    
                                    2.8%
                                 | |
| 4 | 23 | 
                                    
                                    2.2%
                                 | |
| 5 | 46 | 
                                    
                                    4.5%
                                 | |
| 6 | 10 | 
                                    
                                    1%
                                 | |
| 7 | 10 | 
                                    
                                    1%
                                 | |
| 8 | 10 | 
                                    
                                    1%
                                 | |
| 9 | 8 | 
                                    
                                    0.8%
                                 | |
| 10 | 43 | 
                                    
                                    4.2%
                                 | |
| 11 | 4 | 
                                    
                                    0.4%
                                 | |
| 12 | 3 | 
                                    
                                    0.3%
                                 | |
| 13 | 4 | 
                                    
                                    0.4%
                                 | |
| 14 | 2 | 
                                    
                                    0.2%
                                 | |
| 15 | 9 | 
                                    
                                    0.9%
                                 | |
| 16 | 2 | 
                                    
                                    0.2%
                                 | |
| 17 | 1 | 
                                    
                                    0.1%
                                 | |
| 18 | 3 | 
                                    
                                    0.3%
                                 | |
| 19 | 1 | 
                                    
                                    0.1%
                                 | |
| 20 | 28 | 
                                    
                                    2.7%
                                 | |
| 22 | 2 | 
                                    
                                    0.2%
                                 | |
| 24 | 1 | 
                                    
                                    0.1%
                                 | |
| 25 | 5 | 
                                    
                                    0.5%
                                 | |
| 26 | 1 | 
                                    
                                    0.1%
                                 | |
| 28 | 2 | 
                                    
                                    0.2%
                                 | |
| 29 | 1 | 
                                    
                                    0.1%
                                 | |
| 30 | 10 | 
                                    
                                    1%
                                 | |
| 32 | 1 | 
                                    
                                    0.1%
                                 | |
| 35 | 3 | 
                                    
                                    0.3%
                                 | |
| 38 | 1 | 
                                    
                                    0.1%
                                 | |
| 39 | 1 | 
                                    
                                    0.1%
                                 | |
| 40 | 3 | 
                                    
                                    0.3%
                                 | |
| 42 | 1 | 
                                    
                                    0.1%
                                 | |
| 43 | 2 | 
                                    
                                    0.2%
                                 | |
| 44 | 1 | 
                                    
                                    0.1%
                                 | |
| 45 | 2 | 
                                    
                                    0.2%
                                 | |
| 46 | 1 | 
                                    
                                    0.1%
                                 | |
| 47 | 1 | 
                                    
                                    0.1%
                                 | |
| 50 | 13 | 
                                    
                                    1.3%
                                 | |
| 55 | 1 | 
                                    
                                    0.1%
                                 | |
| 58 | 1 | 
                                    
                                    0.1%
                                 | |
| 61 | 1 | 
                                    
                                    0.1%
                                 | |
| 75 | 1 | 
                                    
                                    0.1%
                                 | |
| 80 | 2 | 
                                    
                                    0.2%
                                 | |
| 87 | 1 | 
                                    
                                    0.1%
                                 | |
| 92 | 1 | 
                                    
                                    0.1%
                                 | |
| 100 | 13 | 
                                    
                                    1.3%
                                 | |
| 104 | 1 | 
                                    
                                    0.1%
                                 | |
| 120 | 1 | 
                                    
                                    0.1%
                                 | |
| 130 | 1 | 
                                    
                                    0.1%
                                 | |
| 150 | 1 | 
                                    
                                    0.1%
                                 | |
| 200 | 1 | 
                                    
                                    0.1%
                                 | |
| 221 | 1 | 
                                    
                                    0.1%
                                 | |
| 280 | 1 | 
                                    
                                    0.1%
                                 |