I can not sure of that but maybe in all country have 20% using bitcoin all over the country. Because many people dont have internet connection and they dont know what is bitcoin yet. But i think always get know about bitcoin so number of using bitcoin is increasing.
You are saying 20% which is alot more and i think not even 5% users in my country are using bitcoins and over the world also i think the number would be less that 10%,even those who have regular internet connections do not even know about bitcoin what it really is.