| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 14 | 
                                    
                                    2.3%
                                 | 
| 0 | 224 | 
                                    
                                    36.6%
                                 | |
| 1 | 6 | 
                                    
                                    1%
                                 | |
| 2 | 5 | 
                                    
                                    0.8%
                                 | |
| 3 | 4 | 
                                    
                                    0.7%
                                 | |
| 5 | 22 | 
                                    
                                    3.6%
                                 | |
| 7 | 1 | 
                                    
                                    0.2%
                                 | |
| 10 | 38 | 
                                    
                                    6.2%
                                 | |
| 15 | 7 | 
                                    
                                    1.1%
                                 | |
| 20 | 31 | 
                                    
                                    5.1%
                                 | |
| 25 | 6 | 
                                    
                                    1%
                                 | |
| 29 | 1 | 
                                    
                                    0.2%
                                 | |
| 30 | 46 | 
                                    
                                    7.5%
                                 | |
| 35 | 6 | 
                                    
                                    1%
                                 | |
| 40 | 21 | 
                                    
                                    3.4%
                                 | |
| 49 | 1 | 
                                    
                                    0.2%
                                 | |
| 50 | 25 | 
                                    
                                    4.1%
                                 | |
| 55 | 2 | 
                                    
                                    0.3%
                                 | |
| 60 | 17 | 
                                    
                                    2.8%
                                 | |
| 65 | 3 | 
                                    
                                    0.5%
                                 | |
| 70 | 19 | 
                                    
                                    3.1%
                                 | |
| 75 | 6 | 
                                    
                                    1%
                                 | |
| 78 | 1 | 
                                    
                                    0.2%
                                 | |
| 80 | 26 | 
                                    
                                    4.2%
                                 | |
| 85 | 5 | 
                                    
                                    0.8%
                                 | |
| 88 | 1 | 
                                    
                                    0.2%
                                 | |
| 90 | 30 | 
                                    
                                    4.9%
                                 | |
| 94 | 1 | 
                                    
                                    0.2%
                                 | |
| 95 | 9 | 
                                    
                                    1.5%
                                 | |
| 97 | 1 | 
                                    
                                    0.2%
                                 | |
| 98 | 1 | 
                                    
                                    0.2%
                                 | |
| 99 | 1 | 
                                    
                                    0.2%
                                 | |
| 100 | 31 | 
                                    
                                    5.1%
                                 |