| Value | Category | Cases | |
|---|---|---|---|
| 0 | Worst form | 349 | 
                                    
                                    29.7%
                                 | 
| 1 | 20 | 
                                    
                                    1.7%
                                 | |
| 2 | 44 | 
                                    
                                    3.7%
                                 | |
| 3 | 42 | 
                                    
                                    3.6%
                                 | |
| 4 | 32 | 
                                    
                                    2.7%
                                 | |
| 5 | 133 | 
                                    
                                    11.3%
                                 | |
| 6 | 18 | 
                                    
                                    1.5%
                                 | |
| 7 | 23 | 
                                    
                                    2%
                                 | |
| 8 | 26 | 
                                    
                                    2.2%
                                 | |
| 9 | 8 | 
                                    
                                    0.7%
                                 | |
| 10 | Best form | 118 | 
                                    
                                    10%
                                 | 
| 99 | Missing data | 364 | 
                                    
                                    30.9%
                                 |