Fact
The overwhelming majority of smokers—72%—either earn lower wages, lack health insurance and/or have less education.
Source 1:
Journal of Health Care for the Poor and Underserved, Volume 28, Number 1, February 2017, pp. 100-107 (Article)
https://drive.google.com/file/d/0BxiDeKOIIDM8dW1sR19hdm5WSEU/view