| Value | Category | Cases | |
|---|---|---|---|
| 1 | 1 A result of human activities | 159105 |
57.2%
|
| 2 | 2 A result of natural causes | 59640 |
21.4%
|
| 3 | 3 (Both) - (DO NOT READ) | 53277 |
19.1%
|
| 4 | 4 (DK) | 6058 |
2.2%
|
| 5 | 5 (Refused) | 317 |
0.1%
|
| Sysmiss | 820886 |