If the state of California were an independent country, it would have the fifth largest economy in the world, according to a fascinating report by The Economist that looks at both that state and Texas as the harbingers of two alternative futures for the United States. That got us thinking – how do the economies of the individual US states stack up against other countries? California's economy is about the size of the United Kingdom's, while Texas's matches up with Canada's. Who's on par with Sri Lanka or the Czech Republic? Our map's got 'em all.