Don't forget people in European countries there are a lot of people who are already using bitcoins there and in my opinion they are the ones who are much involved with the transaction in deep web. But the ratio of you have given that is also my estimation on many people are there already who are using bitcoin all over the world.
There are so many bitcoin users these days you know i think that we will never reach the end of the bitcoin becuase i know for sure that everyday
there are coming more and more new people.