| Value | Category | Cases | |
|---|---|---|---|
| 1 | Traffic | 292 |
17.1%
|
| 2 | Planes | 3 |
0.2%
|
| 3 | Queries and stone cutting | 11 |
0.6%
|
| 4 | Construction | 45 |
2.6%
|
| 5 | Industrial activities | 25 |
1.5%
|
| 6 | Other (specify) | 115 |
6.7%
|
| Sysmiss | 1218 |