You know what? I won't even verify the data because this leads to a much more important question: how much of that is linked to how the society they are in treats them?

In the USA the only reason weed was made illegal was because mostly black people used it, due to how easy it was to grow and therefore much less expensive to acquire. Which was a factor because black people were only recently freed from slavery.

So why not a study on the socioeconomic status instead of race then see how the two correlate?