| Value | Category | Cases | |
|---|---|---|---|
| 0 | 1 | 
                                    
                                    0%
                                 | |
| 1 | 476 | 
                                    
                                    15%
                                 | |
| 2 | 118 | 
                                    
                                    3.7%
                                 | |
| 3 | 262 | 
                                    
                                    8.2%
                                 | |
| 4 | 302 | 
                                    
                                    9.5%
                                 | |
| 5 | 499 | 
                                    
                                    15.7%
                                 | |
| 6 | 446 | 
                                    
                                    14%
                                 | |
| 7 | 278 | 
                                    
                                    8.7%
                                 | |
| 8 | 340 | 
                                    
                                    10.7%
                                 | |
| 9 | 138 | 
                                    
                                    4.3%
                                 | |
| 10 | 121 | 
                                    
                                    3.8%
                                 | |
| 11 | 62 | 
                                    
                                    1.9%
                                 | |
| 12 | 43 | 
                                    
                                    1.4%
                                 | |
| 13 | 25 | 
                                    
                                    0.8%
                                 | |
| 14 | 8 | 
                                    
                                    0.3%
                                 | |
| 15 | 9 | 
                                    
                                    0.3%
                                 | |
| 16 | 3 | 
                                    
                                    0.1%
                                 | |
| 17 | 2 | 
                                    
                                    0.1%
                                 | |
| Missing value | 50 | 
                                    
                                    1.6%
                                 |