| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 | 
                                    
                                    0.1%
                                 | |
| 2 | 3 | 
                                    
                                    0.2%
                                 | |
| 3 | 4 | 
                                    
                                    0.2%
                                 | |
| 4 | 3 | 
                                    
                                    0.2%
                                 | |
| 5 | 3 | 
                                    
                                    0.2%
                                 | |
| 6 | 6 | 
                                    
                                    0.3%
                                 | |
| 7 | 3 | 
                                    
                                    0.2%
                                 | |
| 8 | 5 | 
                                    
                                    0.3%
                                 | |
| 12 | 1 | 
                                    
                                    0.1%
                                 | |
| 13 | 2 | 
                                    
                                    0.1%
                                 | |
| Missing value | 1930 | 
                                    
                                    98.4%
                                 |