| Value | Category | Cases | Weighted | |
|---|---|---|---|---|
| 1 | Industrial activities | 4 | 3 |
0.1%
|
| 2 | Waste burning | 4 | 4 |
0.1%
|
| 3 | Transportation | 13 | 10 |
0.4%
|
| 4 | Construction | 7 | 7 |
0.3%
|
| 5 | Other/specify | 2 | 2 |
0.1%
|
| Sysmiss | 2728 | 2731 |