| Value | Category | Cases | |
|---|---|---|---|
| 1 | Very great extent | 1469 |
7.7%
|
| 2 | Great extent | 3223 |
16.8%
|
| 3 | Neither extent | 5147 |
26.9%
|
| 4 | A small extent | 4566 |
23.8%
|
| 5 | Very small extent | 4753 |
24.8%
|