| Value | Category | Cases | |
|---|---|---|---|
| 1 | Traffic | 29 |
1%
|
| 2 | Planes | 1 |
0%
|
| 3 | Queries and stone cutting | 7 |
0.2%
|
| 4 | Construction | 25 |
0.9%
|
| 5 | Industrial activities | 52 |
1.8%
|
| 6 | Others | 44 |
1.6%
|
| Sysmiss | 2675 |