| 1968 | 1990 | Evolution | Structure | |||
| brute | % | en 1968 | en 1990 | |||
| Agriculture, sylviculture, pêche | 2864 | 2052 | -812 | -28,35% | 9,29% | 5,53% |
| Industrie | 14576 | 12600 | -1976 | -13,56% | 47,26% | 33,98% |
| Bâtiment et travaux publics | 3092 | 3416 | 324 | 10,48% | 10,03% | 9,21% |
| Commerce | 3628 | 4016 | 388 | 10,69% | 11,76% | 10,83% |
| Services marchands | 2960 | 6756 | 3796 | 128,24% | 9,60% | 18,22% |
| Services non marchands | 1388 | 4592 | 3204 | 230,84% | 4,50% | 12,39% |
| Autres | 2332 | 3645 | 1313 | 56,30% | 7,56% | 9,83% |
| 30840 | 37077 | 6237 | 20,22% | 100,00% | 100,00% | |