| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 47 |
2.9%
|
| 1 | Human Activity | 616 |
38.5%
|
| 2 | Natural processes | 232 |
14.5%
|
| 3 | Both human activity and natural processes | 130 |
8.1%
|
| 4 | None of these | 10 |
0.6%
|
| 7 | Not Applicable | 528 |
33%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don’t know / Haven’t heard enough | 36 |
2.3%
|