You are correct, but since some may read that and assume that all aviation fuel is leaded, I wanted to add more info.

Most people don't know that "airplane fuel" and "jet fuel" are different. Jet fuel is not leaded. The fuel used by small, piston-driven prop engines is. Because small piston aircraft still use leaded fuel, aviation is still the largest source of airborne lead emissions. The FAA is working to phase it out by 2030.

huh. maybe the chemtrail people were onto something.

Just flew with 100LL, and I also clean up with anti-lead soap. I'm the only pilot I know who does this, but I can't wait to fly something electric ugh.

It's why boomers are so fucking dumb

The divergence makes sense.

Children age out of the sample cohort, but still have high lead levels and still contribute to the crime cohort.

I'd expect to see the lead level rate be proportional to the birth rate and the crime rate proportional to the death rate. Having the chart extend another 15 years to today might show that.

Perhaps the preschoolers who were exposed to lead, who then went on to become violent 20-somethings, continued to be more violent in their 30s.

And the paint, don't forget the leaded paint. And the ceramic tile. And cosmetics. And costume jewelry. And pipes/plumbing. And pottery. And older vinyl, like blinds. And almost all older strained glass uses lead to hold the panels together. And even older plastics often contained lead to soften the material, and we all know how badly old plastic often deteriorates.

There's a shit ton of lead in products made before the turn of the century.

It is one of the processes of lead poisoning yes. Lead is mistaken for Calcium and stored in your bones.

There's some studies that look into this and its effects on mental health of all stripes. I'm certain in the coming decades there'll be more as the boomers start suffering and dying.