This is quite irritating. Do you have any proof for your wild claim? IMO, less than 0.01% of the bitcoins are used to buy drugs. Many of the dark-markets are no longer active and those which are operational right now have reported declining revenues.
Do you have proof on YOUR claim? Where are the facts of your claim, please give us the data so we could se that what you are saying is true. Only .01% of Bitcoins are used in the dark markets to buy drugs, really? That is very hard to believe. The dark markets are growing to become more than a billion $ industry, so there should be more than .01% of Bitcoins in use in there.