| Value | Category | Cases | |
|---|---|---|---|
| 4 | 1 | 
                                
                                0.3%
                             | |
| 5 | 2 | 
                                
                                0.6%
                             | |
| 6 | 2 | 
                                
                                0.6%
                             | |
| 7 | 2 | 
                                
                                0.6%
                             | |
| 8 | Don't Know | 5 | 
                                
                                1.4%
                             | 
| 9 | 1 | 
                                
                                0.3%
                             | |
| 99 | Not applicable | 340 | 
                                
                                96.3%
                             |