| Industry | 1983 | 1987 | 1991 |
| Agriculture | 2.8 | 2.9 | 3.1 |
| Nonagricultural industries | 4.1 | 3.9 | 4.1 |
| Mining | 3.9 | 6.7 | 6.3 |
| Construction | 2.9 | 2.8 | 3.4 |
| Manufacturing | 5.9 | 6.0 | 5.8 |
| Durable goods | 6.1 | 6.5 | 6.3 |
| Nondurable goods | 5.6 | 5.4 | 5.2 |
| Transportation and public utilities | 7.0 | 6.5 | 6.8 |
| Wholesale trade | 4.3 | 4.2 | 3.9 |
| Retail trade | 2.4 | 2.3 | 2.4 |
| Finance, insurance, and real estate | 3.7 | 3.5 | 3.9 |
| Services | 3.7 | 3.7 | 3.8 |
| Public administration | 6.6 | 7.3 | 7.3 |
| RETURN | |||