| Value | Category | Cases | |
|---|---|---|---|
| 1 | Traffic | 399 |
12.8%
|
| 2 | Airplanes | 10 |
0.3%
|
| 3 | quarries and stone cutting | 26 |
0.8%
|
| 4 | Construction work | 22 |
0.7%
|
| 5 | industrial activities | 57 |
1.8%
|
| 6 | other | 36 |
1.2%
|
| 7 | Commercial activities | 67 |
2.1%
|
| 8 | School / Nursery | 13 |
0.4%
|
| 9 | Electrical generator/ water motor | 2 |
0.1%
|
| 10 | More than one source | 12 |
0.4%
|
| 11 | Population density | 68 |
2.2%
|
| Sysmiss | 2410 |