The USA, at 300 million people, is only 5% of the planetary population (over 6,000 million people).<p>Even if you discard huge chunks of the developing world as not a reliable market, you've got 500M people in the EU, 200M+ in the developed Pacific Rim (Japan, SK, Taiwan), 300M middle-class Chinese, and so on. It probably adds up to 1-1.5Bn developed world citizens.<p>For a 5% minority, the USA punches above its class at 20% of traffic ... but in the long term, hopefully it will trend towards only 5% of traffic. (I say "hopefully" because that'd indicate the rest of the world was at the same average level of connectedness ...)