Source: Sumit D. Agarwal, Anna L. Goldman, and Benjamin D. Sommers, Health Affairs, Vol. 38 No. 7, July 2019
From the abstract:
Analyzing national survey data, we found that workers in traditionally blue-collar industries (service jobs, farming, construction, and transportation) experienced the largest gains in health insurance after implementation of the Affordable Care Act (ACA) in 2014. Compared to other occupations, these had lower employer-based coverage rates before the ACA. Most of the post-ACA coverage gains came from Medicaid and directly purchased nongroup insurance.