You mean THC levels?
Coffee and cigarettes helped us win 2 world wars, go into space and build great things. All you get from using pot is crappy rock music.
I see a correlation between the previous years in which generally thin people smoked a lot of cigarettes. Today, we have a lot of ex-smokers and an obesity epidemic.
I think we were a better country back when more people smoked. I don’t say that because smoking was necessarily good. I say it because once upon a time, the government didn’t feel the need to micro-manage every little aspect of your public and private life.