heroin made from opium grown in afghanistan makes up 95% of the market in europe. however, only 1% of the us supply of heroin comes from afghanistan, according to the us drug enforcement agency. the u.s. buys 80% of its morphine from turkey and india. france, hungary and spain are also global producers in the legal trade, supervised under a 1961 u.n. treaty. seems legit  so you get 1% from afgan but 80% from contries that get 95% from their gotcha
United Kingdom