So it was 15T/person in 1920, then it crossed the 20T mark in 70s and now has fallen back to 15T. The catch is that the US population has increased quite a lot.

So it was 15T/person in 1920, then it crossed the 20T mark in 70s and now has fallen back to 15T. The catch is that the US population has increased quite a lot. Are there similar charts for CO2 absorbtion by oceans and trees?