I think they were asking for the source because the link you shared is just Wikipedia to a file. I was wondering about the original source of data too.

Edit: full link came out weird like yours. No wonder we were confused.

https://en.m.wikipedia.org/wiki/File:Rational_scale_to_assess_the_harm_of_drugs_(mean_physical_harm_and_mean_dependence).svg

Sync 👍