| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Human Activity | 511 |
42.6%
|
| 2 | Natural processes | 187 |
15.6%
|
| 3 | Both human activity and natural processes | 232 |
19.3%
|
| 4 | None of these | 7 |
0.6%
|
| 7 | Not Applicable | 248 |
20.7%
|
| 8 | Refused | 0 |
0%
|
| 9 | Don’t know / Haven’t heard enough | 15 |
1.3%
|