| Value | Category | Cases | |
|---|---|---|---|
| 1 | Much more than normal | 12 | 
                                    
                                    3.5%
                                 | 
| 2 | Somewhat higher than usual | 115 | 
                                    
                                    33.5%
                                 | 
| 3 | Normal | 130 | 
                                    
                                    37.9%
                                 | 
| 4 | Less than normal | 79 | 
                                    
                                    23%
                                 | 
| 5 | Much less than normal | 7 | 
                                    
                                    2%
                                 |