| 1968 | 1990 | Evolution | Structure | |||
| brute | % | En 1968 | en 1990 | |||
| Agriculture, sylviculture, pêche | 5572 | 2496 | -3076 | -55,20% | 1,18% | 0,42% |
| Industrie agro-alimentaire | 10428 | 9324 | -1104 | -10,59% | 2,21% | 1,55% |
| Production et distribution d'énergie | 5892 | 7988 | 2096 | 35,57% | 1,25% | 1,33% |
| Industrie | 173404 | 131443 | -41961 | -24,20% | 36,80% | 21,88% |
| Bâtiment et travaux publics | 46036 | 43096 | -2940 | -6,39% | 9,77% | 7,17% |
| Commerce | 75820 | 76768 | 948 | 1,25% | 16,09% | 12,78% |
| Transports et télécommunications | 34032 | 44196 | 10164 | 29,87% | 7,22% | 7,36% |
| Services marchands | 66980 | 158804 | 91824 | 137,09% | 14,21% | 26,43% |
| Services financiers | 10732 | 20788 | 10056 | 93,70% | 2,28% | 3,46% |
| Services non marchands | 42368 | 105913 | 63545 | 149,98% | 8,99% | 17,63% |
| 471264 | 600816 | 129552 | 27,49% | 100% | 100% | |