| Value | Category | Cases | |
|---|---|---|---|
| -1 | Missing | 0 |
0%
|
| 1 | Human Activity | 678 |
56.5%
|
| 2 | Natural processes | 205 |
17.1%
|
| 3 | Both human activity and natural processes | 118 |
9.8%
|
| 4 | None of these | 1 |
0.1%
|
| 7 | Not applicable | 160 |
13.3%
|
| 8 | Refused | 1 |
0.1%
|
| 9 | Don’t know / Haven’t heard enough | 37 |
3.1%
|