| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very great extent | 483 | 
                                    
                                    15.5%
                                 | 
| 2 | Great extent | 1120 | 
                                    
                                    36%
                                 | 
| 3 | Neither great nor small extent | 801 | 
                                    
                                    25.7%
                                 | 
| 4 | Small extent | 522 | 
                                    
                                    16.8%
                                 | 
| 5 | Very small extent | 187 | 
                                    
                                    6%
                                 | 
| Sysmiss | 3105 |