| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    
| 1 | One year or less | 0 | 
                                                                 
                                    
                                    0%
                                 
                                                             | 
                                                        
                    
| 4 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 6 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 9 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 10 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 11 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 12 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 13 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 14 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 15 | 11 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 16 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 17 | 6 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 18 | 5 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 19 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 20 | 20 | 
                                                                 
                                    
                                    5.2%
                                 
                                                             | 
                                                        
                    |
| 21 | 7 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    |
| 22 | 10 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 23 | 4 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 24 | 10 | 
                                                                 
                                    
                                    2.6%
                                 
                                                             | 
                                                        
                    |
| 25 | 24 | 
                                                                 
                                    
                                    6.2%
                                 
                                                             | 
                                                        
                    |
| 26 | 6 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 27 | 12 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 28 | 7 | 
                                                                 
                                    
                                    1.8%
                                 
                                                             | 
                                                        
                    |
| 29 | 11 | 
                                                                 
                                    
                                    2.8%
                                 
                                                             | 
                                                        
                    |
| 30 | 73 | 
                                                                 
                                    
                                    18.8%
                                 
                                                             | 
                                                        
                    |
| 31 | 5 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 32 | 6 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 33 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 34 | 6 | 
                                                                 
                                    
                                    1.5%
                                 
                                                             | 
                                                        
                    |
| 35 | 35 | 
                                                                 
                                    
                                    9%
                                 
                                                             | 
                                                        
                    |
| 36 | 9 | 
                                                                 
                                    
                                    2.3%
                                 
                                                             | 
                                                        
                    |
| 37 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 38 | 5 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 39 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 40 | 38 | 
                                                                 
                                    
                                    9.8%
                                 
                                                             | 
                                                        
                    |
| 41 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 42 | 5 | 
                                                                 
                                    
                                    1.3%
                                 
                                                             | 
                                                        
                    |
| 44 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 45 | 14 | 
                                                                 
                                    
                                    3.6%
                                 
                                                             | 
                                                        
                    |
| 47 | 2 | 
                                                                 
                                    
                                    0.5%
                                 
                                                             | 
                                                        
                    |
| 48 | 4 | 
                                                                 
                                    
                                    1%
                                 
                                                             | 
                                                        
                    |
| 50 | 12 | 
                                                                 
                                    
                                    3.1%
                                 
                                                             | 
                                                        
                    |
| 51 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 52 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 54 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 55 | 3 | 
                                                                 
                                    
                                    0.8%
                                 
                                                             | 
                                                        
                    |
| 56 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             | 
                                                        
                    |
| 58 | 1 | 
                                                                 
                                    
                                    0.3%
                                 
                                                             |