I think weak introverted thinking applied to the extroverted dimension of perception, plays a big role in culture. But all in all our political and economical structures seem like a fair mix of both. But pure introverted thinking is clearly the goof ball.
I don't see how we could get a grasp of the percentage of people, until we are V.I wizards but even then we could not be objective about it. we can only analyse what contributions constitute the visible world.