"During the peak era of leaded gasoline in the United States, which ran from the late 1960s to the early 1980s, the average blood–lead level (BLL) for the general US population was routinely three to five times higher than the current reference value... Consequently, millions of adults alive today were exposed to high levels of lead as children."
citatation:
https://www.pnas.org/doi/10.1073/pnas...