Changes in union coverage, selected detailed industries, 1979–2019
| Union coverage | Change | ||||
|---|---|---|---|---|---|
| Detailed industry | 1979* | 1983 | 2019 | 1979-2019 | 1983-2019 |
| Fishing, hunting, and trapping | n.a. | 17.8 | 8.0 | n.a. | -9.8% |
| Metal ore mining | 59.6 | 42.2 | 3.2 | -56.4% | -39.0% |
| Coal mining | 67.8 | 62.8 | 9.6 | -58.2% | -53.2% |
| Nonmetallic mineral and not specified mining, and quarrying | 46.6 | 34.8 | 14.2 | -32.4% | -20.6% |
| Newspaper publishers | 24.8 | 21.4 | 6.6 | -18.2% | -14.8% |
| Air transportation | 47.5 | 45.7 | 39.4 | -8.1% | -6.3% |
| Rail transportation | 83.6 | 85.4 | 60.9 | -22.7% | -24.5% |
| Truck transportation | 48.6 | 39.6 | 8.8 | -39.8% | -30.8% |
| Bus service and urban transit | 49.8 | 52.3 | 38.7 | -11.1% | -13.6% |
| Warehousing and storage | 26.2 | 28.1 | 5.7 | -20.5% | -22.4% |
| Radio and television broadcasting and cable | 19.7 | 17.4 | 12.1 | -7.6% | -5.3% |
| Electric power generation, transmission, and distribution | 51.8 | 47.8 | 27.2 | -24.6% | -20.6% |
| Hardware stores | 6.3 | 4.3 | 1.3 | -5.0% | -3.0% |
| Grocery stores | 38.2 | 33.5 | 15.1 | -23.1% | -18.4% |
| Vending machine operators | 16.4 | 18.6 | 4.1 | -12.3% | -14.5% |
| Hotels (Traveler accommodation) | 18.3 | 15.4 | 7.4 | -10.9% | -8.0% |
| Services to buildings and dwellings | 24.6 | 15.6 | 5.9 | -18.7% | -9.7% |
| Barber shops | n.a. | 10.7 | 3.2 | n.a. | -7.5% |
| Hospitals | 21.0 | 22.6 | 15.1 | -5.9% | -7.5% |
* Data for 1979 are pooled May Current Population Survey (CPS) data for 1978-1980.
Source: CPS Outgoing Rotation Group data.