| Value | Category | Cases | |
|---|---|---|---|
| 1 | Industrial activities | 31 |
1.8%
|
| 2 | Waste burning | 144 |
8.4%
|
| 3 | Transportation | 60 |
3.5%
|
| 4 | Construction | 19 |
1.1%
|
| 5 | Other (specify) | 7 |
0.4%
|
| Sysmiss | 1448 |